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Hi everybody. I have a little question; I'm looking for an extended battery for my T-Mobile HTC Touch Pro2. I had some Chinese crap for a while, but it started to completely die on me. At first I went two days on a single charge and do some mad texting and browsing the internet a few times a day for 20-some minute periods. Now, this battery lasts me half of the day just to have the phone on Stand By.
I have a cover identical to this one; mien is not sold anymore http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300432340749&ssPageName=STRK:MEWAX:IT
Now, I really need a new battery for my T-Mobile HTC Touch Pro2, but I also don't want to spend more than $40 with shipping, on it. Any help?? Thank You Guys For Your Help!!
Addition: I want something above 3200 mAh
I haven't seen anything of such a capacity. But you can obtain the item# 180463578660 from ebay.com (sorry I'm not allowed to post links), try it and let us know whether it's a crap, too
medved.m said:
I haven't seen anything of such a capacity. But you can obtain the item# 180463578660 from ebay.com (sorry I'm not allowed to post links), try it and let us know whether it's a crap, too
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Click to collapse
Thanx!! As far as I can tell, this is a cheap Chinese battery. I wouldn't be surprised if it dies 1 month down the road. My battery that I have now looks just like this one, if it is not the same as this. Thank You Though!!
Anybody else??
Now, I really need a new battery for my T-Mobile HTC Touch Pro2, but I also don't want to spend more than $40 with shipping, on it. Any help?? Thank You Guys For Your Help!!
Addition: I want something above 3200 mAh[/QUOTE]
Whoa! That's a lot of mah's. I bet a HTC battery like this one...
http://www.daydeal.com/product.php?productid=38477&cat=4592
...would last as long as a 3200mAh cheap china knock off battery.
Of course your cover may not work, and would need this one to go with the HTC battery.
http://www.daydeal.com/product.php?productid=38476&cat=4592
Neither of above given will work with T-Mobile's HTC TP2. I called, to verify.
Any other suggestions?
ilyabyk83 said:
Neither of above given will work with T-Mobile's HTC TP2. I called, to verify.
Any other suggestions?
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Click to collapse
I can't find any extended batteries for the GSM phones.
The only two suggestion I have, is do what I do. I have a spare OEM battery that gets charged in a cradle. I will take it with me if I fear a dead battery before I can find somewhere to charge back up. And I have one of these in my laptop bag as a redundant source for charging.
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
GWelker62 said:
I can't find any extended batteries for the GSM phones.
The only two suggestion I have, is do what I do. I have a spare OEM battery that gets charged in a cradle. I will take it with me if I fear a dead battery before I can find somewhere to charge back up. And I have one of these in my laptop bag as a redundant source for charging.
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
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Click to collapse
Carrying that device around, is not an option. Any other thoughts people??
GWelker62 said:
I can't find any extended batteries for the GSM phones.
The only two suggestion I have, is do what I do. I have a spare OEM battery that gets charged in a cradle. I will take it with me if I fear a dead battery before I can find somewhere to charge back up. And I have one of these in my laptop bag as a redundant source for charging.
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
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Click to collapse
I found one
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260650589502&_rdc=1
Anybody tried it? Does anybody know if the battery NOT THE COVER work with T-Mo TP2??
GWelker62 said:
I can't find any extended batteries for the GSM phones.
The only two suggestion I have, is do what I do. I have a spare OEM battery that gets charged in a cradle. I will take it with me if I fear a dead battery before I can find somewhere to charge back up. And I have one of these in my laptop bag as a redundant source for charging.
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
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Click to collapse
In case somebody runs in to this issue too, I found this
http://www.mobilecityonline.com/wireless/store/productdetail.asp?productid=25416#section1
http://forum.xda-developers.com/showthread.php?t=583927
yatrg said:
http://forum.xda-developers.com/showthread.php?t=583927
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Click to collapse
Hi. What is it that I'm supposed to see over on that link??
ilyabyk83 said:
I found one
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260650589502&_rdc=1
Anybody tried it? Does anybody know if the battery NOT THE COVER work with T-Mo TP2??
Click to expand...
Click to collapse
That cover won't work with the T-mobile US version. The US version has a very shallow cover, whereas all other models have a large wrap-around cover. You might be able to get the cover for the Mugen battery and use it with some other large battery.
ilyabyk83 said:
In case somebody runs in to this issue too, I found this
http://www.mobilecityonline.com/wireless/store/productdetail.asp?productid=25416#section1
Click to expand...
Click to collapse
That one won't work with T-Mobile US. It is a special case back.
There is only one option custom made for T-Mobile
That is the Mugen 3200, it is $79.
http://www.mugen-power-batteries.co...ement-battery-with-battery-door-in-brown.html
Here is a link to the utube video showing the battery:
http://www.youtube.com/watch?v=vwwlQ0ZkGro
EDIT: Have you considered flashing a different ROM? I get a couple of days use out of my latest NRG.
Which NRG are you using?
mcass said:
Which NRG are you using?
Click to expand...
Click to collapse
You need to use the "quote" button, or people won't know to which post you are responding. If you mean me, check my signature below.
If you go to NRG, use the "classic" CHT, not the 2.0; the 2.0 is still in beta and the last one I flashed was a battery hog.
http://hotfile.com/list/596845/0c4b3b5
Since AT&T's model has the thicker NCF 1650mah battery by default I'm thinking that the Korean NFC 2000mah package may fit since that is probably what the AT&T GSII build may likely be based on since the AT&T version has NFC and is a mm or so different in size vs the international version, similar to the Korean SGSII version and how the international version can't handle the Korean kit (the 2000mah NFC battery fits, the back doesn't).
What would be interesting to know is if the international battery kit back fits the Korean GSII's since we know the Korean battery kit back does not fit the international GSII, and from what I've seen on the internet the AT&T version can not use the international kit (probably due to the back but the battery may still fit).
If anything I hope its just the back of the AT&T GSII that is incompatible with the international GSII cause if the battery and the back is different in size then I'll be really pissed cause that would mean that AT&T has a totally different size from all the rest of the GSII's which could make buying accessories really slim picking, one of the main reasons why I held out over the AT&T variant over the Sprint version was the similarities with the international version which means more accessories to choose from. So HOPEFULLY the Korean kit works.
Another option is to look at the batteries for the Indian version of the GSII since it supposedly has NFC as well but I have not seen anything on it. And of course we could just wait for AT&T and Samsung bring out the 2000mah battery kit for the AT&T GSII but I'd be surprised if they have any plans on doing that anytime soon if at all since Samsung will be busy with the Nexus and AT&T will be busy with their upcoming QHD and HD phones.
It's just a hunch but I went and ordered the Korean NFC 2000mah battery kit from exportprive for $35 USD (plus $20 USD "express" shipping) over the weekend along with a couple of those charger stands ($13 USD each) and I guess they will ship it soon so I'll be the guinea pig for testing the Korean battery kit and the AT&T GSII, wish me luck !
That is a lot of typing for a battery ha ha..jk
Look forward to seeing if this works if so I'll follow suit.
From reading the general SGSII 2000 mAh thread, I believe as long as it's "NFC" it will fit our phone.
After all that hassle, it will suck if the 2000mAh batteries have less capacity than the 1650mAh batteries due to Samsung's standards over cheap battery mfrs...
joeybear23 said:
After all that hassle, it will suck if the 2000mAh batteries have less capacity than the 1650mAh batteries due to Samsung's standards over cheap battery mfrs...
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Click to collapse
The 2000 mAh batteries are made by Samsung.
jivy26 said:
That is a lot of typing for a battery ha ha..jk
Look forward to seeing if this works if so I'll follow suit.
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Click to collapse
LOL yeah I can be wordy but hopefully it makes for good reading
joeybear23 said:
After all that hassle, it will suck if the 2000mAh batteries have less capacity than the 1650mAh batteries due to Samsung's standards over cheap battery mfrs...
Click to expand...
Click to collapse
Reports so far from people using the 2000mah batteries on the international GSII are calling it a 20%+ gain in battery life along with better cooling due to different back and overall good looks without much of an addition in thickness with the phone being around the thickness of the Captivate after the battery and back are installed. If it works I think it will be a great addition to an already great phone.
Ah, just got a response from exportprive that explains the situation:
Hi,
The EB-K1A2EBSG is the Korean version of the EB-K1A2EBEGSTD, and was supposed to be compatible with all Galaxy S 2 versions. However, it turns out that only the back plate is incompatible, and only fits the Korean Galaxy S 2. In fact, the 3 top left grooves (with the outside of the back plate facing you) are aligned differently by just a few millimeters, which bends the case when trying to insert it in your device. We apologize for any inconvenience, and offer you the following alternatives to solve this problem:
1. A refund for this item (or a credit of the same amount).
2. A partial refund of $6 USD per item if you wish to keep it as an extended battery (which is an NFC version).
We are open to any other suggestions. Please let us know what you wish to do.
Click to expand...
Click to collapse
I wonder how much trouble it would be to get an extended back for the AT&T version to fit this back? Seeing how the 2000mah NFC batteries aren't as easy to come by as the even more hard to come by regular international 2000mah batteries.
I would hate for someone to be a guinea pig but I'm going to wait till someone tries it on the US version.
I await to see how this plays out. I would love to have the larger battery
Sent from my SAMSUNG-SGH-I777 using XDA App
thehavock18 said:
I await to see how this plays out. I would love to have the larger battery
Sent from my SAMSUNG-SGH-I777 using XDA App
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Click to collapse
I cancelled my order, the battery does fit but then the replacement back to go with the battery doesn't. Hopefully Samsung will put this kit out for the AT&T version .
Aquarianperry said:
I cancelled my order, the battery does fit but then the replacement back to go with the battery doesn't. Hopefully Samsung will put this kit out for the AT&T version .
Click to expand...
Click to collapse
I wonder if there's a non-Samsung door that will work.
I got this battery with a dock charger and it works fine but when I plug it in to anything (computer/usb or power/usb) it freezes the phone and makes it cycle the battery charging/phone off symbol while the battery(?) makes a very quiet clicky sound. Not good. So I started charging it on the dock (came with a spare battery charging slot) and carrying it as an extra. It works fine, just don't charge your precious AT&T Galaxy S2 with it.
I did the shot at this angle so you could see the contacts, I saw some mention of it. My bad on the upside-down hah.
All questions concerning an AT&T version seem to be ignored in the international version thread...has anyone found one that fits our version??
The 2000 mAh battery for the international Galaxy S 2 should work on the AT&T version since the back appears identical.
the backs appear identical, however the international version is not NFC capable and therefore that battery will not be the same. but i agree that the I9100 thread seems to ignore any comments about the I777. wth.
I just bought the 2000 mah batter from Ebay and it has the NFC label on it. Of course, I have the international version and it doesn't fit. For those that have the US version, PM me if you'd like to buy it. I'm in the SF Bay Area, CA.
ExKreations said:
I got this battery with a dock charger and it works fine but when I plug it in to anything (computer/usb or power/usb) it freezes the phone and makes it cycle the battery charging/phone off symbol while the battery(?) makes a very quiet clicky sound. Not good. So I started charging it on the dock (came with a spare battery charging slot) and carrying it as an extra. It works fine, just don't charge your precious AT&T Galaxy S2 with it.
I did the shot at this angle so you could see the contacts, I saw some mention of it. My bad on the upside-down hah.
Click to expand...
Click to collapse
Same damn thing happens to mines ugh....
Sent from my SAMSUNG-SGH-I777 using xda premium
I just posted about the extended battery I recieved yesterday. It is a 2600MAH battery from a company called TruCell. I took a risk because they were the only company I found on the web selling a battery specifically for the AT&T model. Funny on Ebay it said for the AT&T Samsung Galaxy S2 but whe I look at the battery it says for the I9100. In any case the battery and the case fits perfectly. Phone is heavy as all get out but If It gives me an extra 4 to 5 hours of heavy use then I am perfectly fine with it.
what did that monster cost you???
Sent from my SAMSUNG-SGH-I777 using xda premium
Anyone know if the I9100 battery will fit the I777? I see a lot of sellers listing the battery working for both the AT&T I777 and the International I9100.
yeah I cant find this in writing. Where is a good place to find oem Battery's
I got the 2000 mah anker battery off eBay works great! !!
Sent from my SAMSUNG-SGH-I777 using XDA Premium App
The dimensions for the i777 Samsung battery are 59x46x5 mm. I searched and couldn't find dimensions anywhere for the i9100 oem battery. Anyone with i9100 mind measuring the battery dimensions? I hate to order a bunch of stuff only to find it doesn't fit. I don't 100% trust the descriptions on most of the ebay stuff.
Do the I9100 batteries have 3 or 4 contacts? If only 3, they probably won't work, or might damage the additional spring clip in the phone for the 4th contact. (which, if the I9100 batteries only have 3 contacts, means the 4th is for NFC.)
Let me help you guys out here. I ordered 3 international gs2 batteries 2 months ago in preparation for this phone and they work just fine in the att version. the dimensions are exactly the same and everything has been just peachy.
anilkuj said:
I got the 2000 mah anker battery off eBay works great! !!
Sent from my SAMSUNG-SGH-I777 using XDA Premium App
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Click to collapse
does it give you more power? or it's just labeling? also, will the stock back cover still fit?
I don't see 2000mah on ebay, just 1900mah for anker battery.
Thanks guys, I think I will go ahead and order some i9100 batteries then. There are a lot more options available than for the i777 stuff right now.
Note that anything that includes an alternative battery door won't work. The battery doors ARE different.
Yeah I assumed that and wasn't going to go with an extended battery but do plan on getting a dock which should be similar enough to work well.
Entropy512 said:
Note that anything that includes an alternative battery door won't work. The battery doors ARE different.
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Click to collapse
God damn it. I want that 2,000 mAh battery that Samsung makes.
Why do they have to make the battery crappy just to say it's thinner than the iPhone.
apexi350z said:
does it give you more power? or it's just labeling? also, will the stock back cover still fit?
I don't see 2000mah on ebay, just 1900mah for anker battery.
Click to expand...
Click to collapse
Not sure i have been using it for just 3 days now , i see i get 2-3 hours more on the anker batteries , but need to use it longer to confirm that.
it fits well with the stock battery cover.
sorry you are right the one i got was 1900mah too.
anilkuj said:
Not sure i have been using it for just 3 days now , i see i get 2-3 hours more on the anker batteries , but need to use it longer to confirm that.
it fits well with the stock battery cover.
sorry you are right the one i got was 1900mah too.
Click to expand...
Click to collapse
Keep us updated
For < $10 a 2-3hr boost is definitely worth it
anilkuj said:
Not sure i have been using it for just 3 days now , i see i get 2-3 hours more on the anker batteries , but need to use it longer to confirm that.
it fits well with the stock battery cover.
sorry you are right the one i got was 1900mah too.
Click to expand...
Click to collapse
thanks for the reply. so from your experience, if you unplug it around 8am and then wait until 8pm at night, do you know how much battery you have left? (normal usage)
thanks!
MikeyMike01 said:
God damn it. I want that 2,000 mAh battery that Samsung makes.
Why do they have to make the battery crappy just to say it's thinner than the iPhone.
Click to expand...
Click to collapse
What he said.
Sent from my SAMSUNG-SGH-I777 using xda premium
damon20r said:
Anyone know if the I9100 battery will fit the I777? I see a lot of sellers listing the battery working for both the AT&T I777 and the International I9100.
Click to expand...
Click to collapse
It MAY or MAY NOT fit, but I can tell you that the NFC antenna in the SGH-I777 (ATT GalaxyS 2) is embedded into the battery. So even if the battery contacts do match, at the very least you'll lose the ability to do NFC. And further, if Samsung messed with the voltages or signalling on the pins (which they might have done in order to get the NFC antenna hooked into the mainboard), you could potentially fry your phone. Instantly, or maybe even over time...
Until further work is done to figure out exactly what goes on what pin, and how it compares to the i9100, I wouldn't use an i9100 battery if I were you...
I got this battery with a dock charger and it works fine but when I plug it in to anything (computer/usb or power/usb) it freezes the phone and makes it cycle the battery charging/phone off symbol while the battery(?) makes a very quiet clicky sound. Not good. So I started charging it on the dock (came with a spare battery charging slot) and carrying it as an extra. It works fine, just don't charge your precious AT&T Galaxy S2 with it.
I did the shot at this angle so you could see the contacts, I saw some mention of it. My bad on the upside-down hah.
ExKreations said:
I got this battery with a dock charger and it works fine but when I plug it in to anything (computer/usb or power/usb) it freezes the phone and makes it cycle the battery charging/phone off symbol while the battery(?) makes a very quiet clicky sound. Not good. So I started charging it on the dock (came with a spare battery charging slot) and carrying it as an extra. It works fine, just don't charge your precious AT&T Galaxy S2 with it.
I did the shot at this angle so you could see the contacts, I saw some mention of it. My bad on the upside-down hah.
Click to expand...
Click to collapse
thats true , any battery except the original battery doesn't seem to work with USB connected to PC .
anilkuj said:
thats true , any battery except the original battery doesn't seem to work with USB connected to PC .
Click to expand...
Click to collapse
Ah, good to know that's been established.
The people who actually bought a bigger battery off ebay, could you please post who the seller was? I see a few batteries for sale but I have been screwed before so that would be awesome if you could post who the seller was that you bought from. I'd love to have two extra batteries on hand. Thanks in advance.
just curious since this has the NFC battery compared to the international SGS2 do we AT&T have to use battery's with NFC !
Also what if the international phone puts in an NFC battery will they have that built in automatically
Just inserting the ATT battery will not give anyone the powers of NFC, if thats what you are asking. Apparently someone found four contact tips on the ATT version instead of three in the international, so that the NFC can talk to the rest of the phone. So there needs to be mechanisms like that in place. So, in short no they won't get NFC by putting in your battery.
But you can insert a replacement battery without NFC and it will just work fine but you wont have NFC (if ATT flips the software switch on, that is). Doesn't mean I encourage you to pop in any battery and test.
Experts can correct me on this.
thelastjedi said:
Just inserting the ATT battery will not give anyone the powers of NFC, if thats what you are asking. Apparently someone found four contact tips on the ATT version instead of three in the international, so that the NFC can talk to the rest of the phone. So there needs to be mechanisms like that in place. So, in short no they won't get NFC by putting in your battery.
But you can insert a replacement battery without NFC and it will just work fine but you wont have NFC (if ATT flips the software switch on, that is). Doesn't mean I encourage you to pop in any battery and test.
Experts can correct me on this.
Click to expand...
Click to collapse
Actually, no one confirmed the 3 vs 4. I know Infuse had 3 - I don't know what international has. I asked and no one provided the information.
Also international batteries will NOT work fine. They flake out as soon as you connect a charger or USB. connexion2005 spent hours trying to debug constant reboot loops and it turned out to be due to using an I9100 battery.
I'm glad I asked because I bought 2 batteries 1 is a off Chinese brand i9199 and the other is a original samsung non NFC battery , I was going to buy the international galaxy but changed my mine and bought the AT&T phone
So your saying the off brand i9100 battery is no good ? just wondering how a battery could cause problems when it's only pushing juice,
I read about the NFC battery someone mentioned it has a chip inside so I guess that isn't true ! so it actually has a extra prong and so does the AT&T phone right!
I wasn't planning to use the i9100 brand battery all the time and charge it in a charger thought I would switch them out when out for the day , So would just using that battery cause problems ?
Entropy512 said:
Actually, no one confirmed the 3 vs 4. I know Infuse had 3 - I don't know what international has. I asked and no one provided the information.
Also international batteries will NOT work fine. They flake out as soon as you connect a charger or USB. connexion2005 spent hours trying to debug constant reboot loops and it turned out to be due to using an I9100 battery.
Click to expand...
Click to collapse
In case you still want the info Entropy, I just checked with my roommate's I9100 (I have an i777), and it also has 4 contact tips
justabrake said:
So your saying the off brand i9100 battery is no good ? just wondering how a battery could cause problems when it's only pushing juice,
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Click to collapse
The battery has an ID resistor (I think it's the pin between + and -) - if it's the wrong value, the charge circuitry will force a shutdown/reboot when charging.
Actually it's the kernel - but until I'm positive that there is NO risk resulting from removing this protection mechanism, I'm not doing it.
The 4th contact is for a antenna in the battery.
Entropy512 said:
The battery has an ID resistor (I think it's the pin between + and -) - if it's the wrong value, the charge circuitry will force a shutdown/reboot when charging.
Actually it's the kernel - but until I'm positive that there is NO risk resulting from removing this protection mechanism, I'm not doing it.
Click to expand...
Click to collapse
This is not the first time Samsung did this. The original Galaxy S batteries are the same. You can't use the Verizon version's battery with rest of Galaxy S lines (AT&T, T-Mo and Sprint). If you do, you get the reboot.
agh1701 said:
The 4th contact is for a antenna in the battery.
Click to expand...
Click to collapse
After seeing the information from Verizon about about Galaxy Nexus battery, it seems the NFC chip, not just the antenna, is inside the battery.
Entropy512 said:
The battery has an ID resistor (I think it's the pin between + and -) - if it's the wrong value, the charge circuitry will force a shutdown/reboot when charging.
Actually it's the kernel - but until I'm positive that there is NO risk resulting from removing this protection mechanism, I'm not doing it.
Click to expand...
Click to collapse
I'm willing to try it if you are willing to create a special kernel.
I'm currently in Hong Kong and bought an i777 from one of the local small merchants. The phone worked in the store, but did not charge when I got it home. The battery does not say "Near Field Communications" on it, even though it looks like an authentic Samsung battery. So I am assuming that I have a genuine i777 (it says AT&T on the top and has the four buttons on the bottom), and a genuine I9100 battery. I am currently waiting for an NFC battery that I bought on Ebay. I also bought a local noname battery so that I can charge one while using the other. Both batteries have 4 terminals.
If anyone knows what the value of the ID resistor is, I'm also willing to try that route to get the phone to charge.
The phone came with MIUI 10/28 and everything else seems to work, including GPS, WiFi, etc. MIUI 12/2, 12/9, 12/16 (not US version) fix the charging problem, but then the phone audio doesn't work. I tried flashing all the i777 modems, but none fixed the audio problem. I was not able to flash the CM7 converted modems because CWM gave some error messages about "I777" (I think it said failed assertion).
I tried flashing Unnamed, Cognition and CM7, but they don't fix the battery problem, but the phone audio and everything else works.
I am a total noob so if I've used any incorrect terms, please forgive my noobness. The last two weeks have been quite an adventure, searching forums, learning about rooting, recovery, downloading ROMs and kernels and modems, etc. Actually, its been a lot of fun.
guilin said:
....
I also bought a local noname battery so that I can charge one while using the other. Both batteries have 4 terminals.
If anyone knows what the value of the ID resistor is, I'm also willing to try that route to get the phone to charge.
Click to expand...
Click to collapse
Most of these batteries will have four contacts, two for power and two for communication to the gas Guage within the battery pack (I2C interface). The few batteries out there with three contacts use a single wire interface, but they are essentially the same - there is a communication path into the cell to talk to the fuel Guage embedded in the pack. The nfc enabled batteries either extend the capabilities of the fuel guage or add an additional part, but in either case, the two functions share the same communication paths - there are no "resistors" to check or change, the ic(s) identify what capabilities they have to the host via the serial interface.
T
Sent from my SAMSUNG-SGH-I777 using XDA App
guilin said:
I'm willing to try it if you are willing to create a special kernel.
I'm currently in Hong Kong and bought an i777 from one of the local small merchants. The phone worked in the store, but did not charge when I got it home. The battery does not say "Near Field Communications" on it, even though it looks like an authentic Samsung battery. So I am assuming that I have a genuine i777 (it says AT&T on the top and has the four buttons on the bottom), and a genuine I9100 battery. I am currently waiting for an NFC battery that I bought on Ebay. I also bought a local noname battery so that I can charge one while using the other. Both batteries have 4 terminals.
If anyone knows what the value of the ID resistor is, I'm also willing to try that route to get the phone to charge.
The phone came with MIUI 10/28 and everything else seems to work, including GPS, WiFi, etc. MIUI 12/2, 12/9, 12/16 (not US version) fix the charging problem, but then the phone audio doesn't work. I tried flashing all the i777 modems, but none fixed the audio problem. I was not able to flash the CM7 converted modems because CWM gave some error messages about "I777" (I think it said failed assertion).
I tried flashing Unnamed, Cognition and CM7, but they don't fix the battery problem, but the phone audio and everything else works.
I am a total noob so if I've used any incorrect terms, please forgive my noobness. The last two weeks have been quite an adventure, searching forums, learning about rooting, recovery, downloading ROMs and kernels and modems, etc. Actually, its been a lot of fun.
Click to expand...
Click to collapse
The ID resistor is buried deep within the battery, on the same board as its protection circuit.
Take the unit back to the store and explain that they did not give you a functional I777 - if this merchant were legitimate you should have received a properly matching battery with the unit.
tedkunich said:
Most of these batteries will have four contacts, two for power and two for communication to the gas Guage within the battery pack (I2C interface). The few batteries out there with three contacts use a single wire interface, but they are essentially the same - there is a communication path into the cell to talk to the fuel Guage embedded in the pack. The nfc enabled batteries either extend the capabilities of the fuel guage or add an additional part, but in either case, the two functions share the same communication paths - there are no "resistors" to check or change, the ic(s) identify what capabilities they have to the host via the serial interface.
Click to expand...
Click to collapse
WRONG.
Have you read the kernel source code for the fuel gauge driver? Probably not. I have. I've even fixed bugs in it.
Have you read the datasheet for the fuel gauge chipset's predecessor? (The current one does not have a publically available datasheet, but it's VERY close to the previous version used in the original GalaxyS series of phones) Can you even name the fuel gauge chipset without Googling?
Have you used an ohmmeter to measure the resistance of the ID pin? I have.
The fuel gauge chipset is in the phone itself, NOT in the battery for this device.
The phone checks for a legitimate battery by connecting a constant-current source (looks like around 0.3 mA) to the battery contact between the + and - terminals. It then measures the voltage of this terminal to see what the value is when the device is on AC or USB power, and powers off if it is outside of certain ranges. See sec_bat_check_vf_adc in drivers/power/sec_battery.c
I777 batteries are 4.7k ohms, and the device looks for a range between 1.1 and 1.8 volts on the vf terminal. I9100 update3 makes this stricter - 1.35 to 1.5 volts. I9100 batteries appear to have a 6k resistor approximately, the Vf check looks for a voltage between 2.0 and 2.1 volts.
I'm not sure what is on the terminal adjacent to the - terminal on the other side - this is likely NFC-related, it is not a bare antenna (extremely high resistance when powered off)
I've seen evidence that the NFC solution is distributed between the battery and the device - I9100 kernels have PN544 support, and at least one I9100 user has managed to get a successful PN544 firmware load. However without the battery side of things, their device doesn't work.
There is a thread in the "accessories" section that is devoted to batteries. Some seem to work well while others cause the bootloop.
Entropy512 said:
WRONG.
Have you read the kernel source code for the fuel gauge driver? Probably not. I have. I've even fixed bugs in it.
Have you read the datasheet for the fuel gauge chipset's predecessor? (The current one does not have a publically available datasheet, but it's VERY close to the previous version used in the original GalaxyS series of phones) Can you even name the fuel gauge chipset without Googling?
Have you used an ohmmeter to measure the resistance of the ID pin? I have.
The fuel gauge chipset is in the phone itself, NOT in the battery for this device.
The phone checks for a legitimate battery by connecting a constant-current source (looks like around 0.3 mA) to the battery contact between the + and - terminals. It then measures the voltage of this terminal to see what the value is when the device is on AC or USB power, and powers off if it is outside of certain ranges. See sec_bat_check_vf_adc in drivers/power/sec_battery.c
I777 batteries are 4.7k ohms, and the device looks for a range between 1.1 and 1.8 volts on the vf terminal. I9100 update3 makes this stricter - 1.35 to 1.5 volts. I9100 batteries appear to have a 6k resistor approximately, the Vf check looks for a voltage between 2.0 and 2.1 volts.
I'm not sure what is on the terminal adjacent to the - terminal on the other side - this is likely NFC-related, it is not a bare antenna (extremely high resistance when powered off)
I've seen evidence that the NFC solution is distributed between the battery and the device - I9100 kernels have PN544 support, and at least one I9100 user has managed to get a successful PN544 firmware load. However without the battery side of things, their device doesn't work.
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Click to collapse
Have not personally looked at the chipset that SAMSUNG uses, but the Texas Instrument line are in-pack gas gages with either I2C or hdq interfaces. The bq245xx series does both flavors of interface.
Are you an electrical engineer? I am, and have been designing this stuff for years - your 4.7k resistor is a pull up on the communication lines. Standard value per the I2C standard.
I have not seen too many designs where the gaging is outside of the pack, it it makes tracking pack changes and giving reasonably accurate results difficult if not impossible. Now, I have no insite into how SAMSUNG designed the hardware, but reading the source code will not give the full picture either. Fuel gaging is a dual discipline function - there is dedicated hardware to measure and track energy going into and out of the cell, and software must controll and track the data.
Peace,
T
Sent from my SAMSUNG-SGH-I777 using XDA App
tedkunich said:
Have not personally looked at the chipset that SAMSUNG uses, but the Texas Instrument line are in-pack gas gages with either I2C or hdq interfaces. The bq245xx series does both flavors of interface.
Are you an electrical engineer? I am, and have been designing this stuff for years - your 4.7k resistor is a pull up on the communication lines. Standard value per the I2C standard.
I have not seen too many designs where the gaging is outside of the pack, it it makes tracking pack changes and giving reasonably accurate results difficult if not impossible. Now, I have no insite into how SAMSUNG designed the hardware, but reading the source code will not give the full picture either. Fuel gaging is a dual discipline function - there is dedicated hardware to measure and track energy going into and out of the cell, and software must controll and track the data.
Peace,
T
Sent from my SAMSUNG-SGH-I777 using XDA App
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Click to collapse
Yes, I am an electrical engineer.
And you clearly have not read the MAX17040 datasheet. Otherwise you would know that Maxim designs their fuel gauges not to depend on a coulomb counter function (current sensor) - which is why it does not require any calibration. Yes, it gives up some accuracy because of that, but the advantage is that the pack has no fuel gauge chip itself. We have a MAX17042, which is a close relative of the 17040. It does have current measurement capability, but this is not enabled in our device.
We don't actually have a MAX17042 or 17040 - we have a MAX8997 PMIC, the fuel gauge is embedded inside it but functionally equivalent to the MAX17042. Older devices have a MAX17040 equivalent built into the MAX8998 PMIC.
And tell me, how can a resistor between a terminal and GROUND be a pullUP resistor like you claim it is?
Don't you think it's a little odd that they're IDing the battery by taking ADC readings, when if that contact were for an I2C or one-wire bus, they could just embed a battery identification in whatever chip was in the battery so that it could be read digitally? Oh yeah, and I2C doesn't exactly work on a single wire like other Samsungs such as the Infuse would have to have, given that they have three-terminal batteries. How is it that they're reading an ADC that's part of the PMIC or CPU to identify the battery if that battery terminal is I2C or some sort of one-wire digital bus?
Entropy512 said:
Take the unit back to the store and explain that they did not give you a functional I777 - if this merchant were legitimate you should have received a properly matching battery with the unit.
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Thanks for all the great info. We did't try to exchange the unit because when we discovered that MIUI 12/2 and later fixed the battery charging problem, we knew that the problem could be fixed/circumvented in the kernel or ROM. My wife and I are retired Electrical Engineers and once we discovered the world of rooting, flashing, adb, CWM, ROMs, kernels, modems, we were addicted. We even rooted our Kindle Fire. If the phone had worked correctly when we bought it, we wouldn't be having all this fun.
Like they say, it's the journey, not the destination.
Thanks again (I already clicked the Thanks Meter).
so a battery boot loop depends on kernel and/or rom?
i bought the samsung 2000 mah non-nfc international version battery for my i777 thinking it should work no problem because i didnt care about having nfc. when i plug my phone in to charge, it causes a reboot loop. i am running task650 icsdout rom with entropy's latest kernel.
polobreaka said:
so a battery boot loop depends on kernel and/or rom?
i bought the samsung 2000 mah non-nfc international version battery for my i777 thinking it should work no problem because i didnt care about having nfc. when i plug my phone in to charge, it causes a reboot loop. i am running task650 icsdout rom with entropy's latest kernel.
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There is code in the kernel that checks for a proper battery.
Until I know more about what subtle differences might exist between I777 and I9100 - I'm not disabling it.
I'll look into maybe making it a "use at your own risk" optional feature.
Entropy512 said:
There is code in the kernel that checks for a proper battery.
Until I know more about what subtle differences might exist between I777 and I9100 - I'm not disabling it.
I'll look into maybe making it a "use at your own risk" optional feature.
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So after reading almost all of the threads on the 2000mAh battery this one was the deepest and most informative as far as why there are problems.
From what I have gleaned in my readings, the I9100 2000mAh battery can be used in the I777 as long as it is charged externally, and you don't care about the NFC ability. Correct?
And if you plug in the charger at any time with the I9000 battery the phone will reboot and continue in a bootloop?
And perhaps in the future with a kernel change we could use the I9000 2000mAh without the bootloop issue? Correct also?
FireRaider said:
So after reading almost all of the threads on the 2000mAh battery this one was the deepest and most informative as far as why there are problems.
From what I have gleaned in my readings, the I9100 2000mAh battery can be used in the I777 as long as it is charged externally, and you don't care about the NFC ability. Correct?
And if you plug in the charger at any time with the I9000 battery the phone will reboot and continue in a bootloop?
And perhaps in the future with a kernel change we could use the I9000 2000mAh without the bootloop issue? Correct also?
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Click to collapse
Correct. (As long as you replace all instances of I9000 with I9100 - I typo that a lot myself.)
My trusted i9305 has done me proud over the past couple of years but over the course of the past year I've noticed a drop off in the battery life. My post comes in 3 parts, but if you think it's better I could break it up and post separately?
#1. Poor battery life.
I'm running the German 4.3 Stock ROM (I9305XXUEMK1) with the factory bootloader and the phone's rooted. Because I flashed the 4.3 ROM I can no longer use the OTA update option and in general I've been happy with keeping things super stable.
I'm using Nobloat to get rid of the bloatware, Allinonetoolbox to keep the number of apps that start on boot to a minimum and Greenify to keep the number of apps ticking over in the background to a minimum.
I have the stock battery, 4 Anker replacements and a cheap Samsung copy and swap between the batteries, charging using an Anker external wall charger from this pack Anker Batteries/charger
I've done a factory reset but that made no noticeable difference. When I check my battery stats there are no rogue apps draining the battery, its the screen that is always the most power hungry. I've run Wakelock detector and there seems nothing untoward there either.
I guess I could look at flashing the ROM again, but if I were to do this, does anyone have a suggestion of an alternative factory ROM? I'm not too worried about upgrading to Kitkat as I read lots about issues with battery life and with otg and sd cards, but I guess by now the latter issues should be resolved.
#2. Check battery capacity
I've been wanting to check the actually capacity of my remaining S3 batteries but the only thing I can find that seems suitable is Nova Battery Tester, but that's no longer on the play store and the only links I can find come from websites that I don't like the look of - does anyone know where I could get the APK from or something similar that I could use. I know the batteries that I have will have a lower capacity now, but I'm wondering how low.
#3. Buying replacement batteries in the UK
I had 4 batteries die on me whilst traveling India for 5 months. They all had the tell-tale bulge so were disposed of. I don't know if it was an issue with the wall charger, the rather unstable power over there or the heat, or a combination of all 3! But now I'm down to just one Anker and one Samsung battery so if I'm to continue with my S3 I'd like to pick up another one or two replacements. I'd happily buy a genuine Samsung one if the price was right but I'm put off by all the Chinese copies out there. The only other option I've found are the Anker ones - I can't find Mugen batteries over here.
If I were to switch between the old batteries and a new one, would I benefit from from deleting the battery stats and sticking with the new one or will the phone be fine switching between them?
Okay, thanks for ploughing through that guys. Any help would be greatly received
woldranger said:
I'd happily buy a genuine Samsung one if the price was right but I'm put off by all the Chinese copies out there. The only other option I've found are the Anker ones
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You could try the ZeroLemon ones (2300mah but no NFC) http://www.amazon.co.uk/Warranty-Zerolemon-Battery-Samsung-Galaxy/dp/B00E0N4WZ2
I switched to these as the genuine Sammy ones were bulging and failing regular as clockwork. The one that I currently run has done around 18 months and still going well.