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Alot has been said about the quality of various batteries that we are all looking at for our devices...however very little about the different chargers that are out there.
I thought my charger that I bought was defective cause I let it charge overnight and it wasn't fully charged. That is not the case.
The Charger that the Note comes with charges at 1A. Most of these external battery only chargers charge at 350mA.
Take a look at this calculator:
http://www.csgnetwork.com/batterychgcalc.html
Using the link to the calculator above, you should expect a 2600mAh battery to fully charge using one of these cheap chargers in about 9 HOURS!! The charger that the note comes with should expect about 3.4 hours. That's a huge difference in charge time!!
So be sure to take a look at the output of these chargers before you get too excited and purchase one. If it takes you 24 hours to charge a battery, what good is it to you?
Thanks for the battery reference URL.
This is basically another scenario of 'you get what you pay for..'
It seems to often apply to batteries and chargers.
Whereas for like cases, you have a better chance of actually saving money and getting quality at the same time.
CradleRob said:
Alot has been said about the quality of various batteries that we are all looking at for our devices...however very little about the different chargers that are out there.
I thought my charger that I bought was defective cause I let it charge overnight and it wasn't fully charged. That is not the case.
The Charger that the Note comes with charges at 1A. Most of these external battery only chargers charge at 350mA.
Take a look at this calculator:
http://www.csgnetwork.com/batterychgcalc.html
Using the link to the calculator above, you should expect a 2600mAh battery to fully charge using one of these cheap chargers in about 9 HOURS!! The charger that the note comes with should expect about 3.4 hours. That's a huge difference in charge time!!
So be sure to take a look at the output of these chargers before you get too excited and purchase one. If it takes you 24 hours to charge a battery, what good is it to you?
Click to expand...
Click to collapse
So I guess for battery longevity, you should use a 500 mA charger (the typical USB output). That way it doesn't charge it too quick (and overheat the battery).
SPtheALIEN said:
So I guess for battery longevity, you should use a 500 mA charger (the typical USB output). That way it doesn't charge it too quick (and overheat the battery).
Click to expand...
Click to collapse
No, actually. Lithium ion batteries, unlike nickle-cadium batteries actually perform and last better with short, fast charges. Android's battery stats are helped by a few full cycles, but it is not better for the battery to full cycle or slow charge.
Sent from my SAMSUNG-SGH-I717 using xda premium
Thank you for this information, very helpful as I have other phone chargers. Is there a way(Windows based utility) to tell how many mah a USB port is outputting while charging?
lmike6453 said:
Thank you for this information, very helpful as I have other phone chargers. Is there a way(Windows based utility) to tell how many mah a USB port is outputting while charging?
Click to expand...
Click to collapse
A multimeter
Sent from my SGH-I717R using xda premium
lmike6453 said:
Thank you for this information, very helpful as I have other phone chargers. Is there a way(Windows based utility) to tell how many mah a USB port is outputting while charging?
Click to expand...
Click to collapse
*I am not an electrical expert, I just play one on TV.*
There are standards for USB outs. Just Google the standard. That said, there is USB1, USB2, and now USB3. Check your motherboard to see which one you have. There is also a newish thing on motherboards that will do a rapid charge by changing a setting on the BIOS. That's what i got off the top of my head. Do a little research.
As was pointed out on another thread, the Note looks for a low resistance/short between pins 2 and 3 of the USB cable. If it sees the low resistance, it enables a high current charge; otherwise, it sticks with USB standard charge of less than 500 ma. The 2/3 pin setup is not true of USB connections to a computer. The Note power adapter is set up this way to do a fast charge. Most chargers and portable battery chargers leave pins 2 and 3 unconnected, so they will not fast charge a Note even if they can supply 1A.
I purchased a Scosche 5000 mah battery with USB ports for charging Ipads, Iphones, and other devices. It also charges a Galaxy Tab with a special USB adapter plug. I tried the Tab adapter with my new Note and it was charging at 5 percent charged every ten minutes or so. Without the USB adapter, the Note charged at 2 percent every ten minutes or so. Without the adapter, the Note displays an MTP initialization notification. With the adapter, there is no MTP notification.
The Scosche battery is a big improvement over older Trent 5000 mah batteries. There is a push button to turn the Scosche battery on. The battery will turn off if no device is attached or it the device is fully charged. One of the ports can output 2.1A for an Ipad. The Trent battery would run down if it was left on.
Staples carries the Scosche battery for $80. I used a $29 online coupon from Staples that expires 3/5/2012.
I did not see anywhere on the Scosche website where they sell the Tab adapter by itself.
Ipaqman01 said:
As was pointed out on another thread, the Note looks for a low resistance/short between pins 2 and 3 of the USB cable. If it sees the low resistance, it enables a high current charge; otherwise, it sticks with USB standard charge of less than 500 ma. The 2/3 pin setup is not true of USB connections to a computer. The Note power adapter is set up this way to do a fast charge. Most chargers and portable battery chargers leave pins 2 and 3 unconnected, so they will not fast charge a Note even if they can supply 1A.
I purchased a Scosche 5000 mah battery with USB ports for charging Ipads, Iphones, and other devices. It also charges a Galaxy Tab with a special USB adapter plug. I tried the Tab adapter with my new Note and it was charging at 5 percent charged every ten minutes or so. Without the USB adapter, the Note charged at 2 percent every ten minutes or so. Without the adapter, the Note displays an MTP initialization notification. With the adapter, there is no MTP notification.
The Scosche battery is a big improvement over older Trent 5000 mah batteries. There is a push button to turn the Scosche battery on. The battery will turn off if no device is attached or it the device is fully charged. One of the ports can output 2.1A for an Ipad. The Trent battery would run down if it was left on.
Staples carries the Scosche battery for $80. I used a $29 online coupon from Staples that expires 3/5/2012.
I did not see anywhere on the Scosche website where they sell the Tab adapter by itself.
Click to expand...
Click to collapse
Do you have a model number on that USB adapter? Maybe in the instructions?
There is only the name Scosche on the adapter. The guide only calls it the Galaxy Tab adapter.
Sent from my SAMSUNG-SGH-I717 using Tapatalk
Ipaqman01 said:
As was pointed out on another thread, the Note looks for a low resistance/short between pins 2 and 3 of the USB cable. If it sees the low resistance, it enables a high current charge; otherwise, it sticks with USB standard charge of less than 500 ma. The 2/3 pin setup is not true of USB connections to a computer. The Note power adapter is set up this way to do a fast charge. Most chargers and portable battery chargers leave pins 2 and 3 unconnected, so they will not fast charge a Note even if they can supply 1A.
I purchased a Scosche 5000 mah battery with USB ports for charging Ipads, Iphones, and other devices. It also charges a Galaxy Tab with a special USB adapter plug. I tried the Tab adapter with my new Note and it was charging at 5 percent charged every ten minutes or so. Without the USB adapter, the Note charged at 2 percent every ten minutes or so. Without the adapter, the Note displays an MTP initialization notification. With the adapter, there is no MTP notification.
The Scosche battery is a big improvement over older Trent 5000 mah batteries. There is a push button to turn the Scosche battery on. The battery will turn off if no device is attached or it the device is fully charged. One of the ports can output 2.1A for an Ipad. The Trent battery would run down if it was left on.
Staples carries the Scosche battery for $80. I used a $29 online coupon from Staples that expires 3/5/2012.
I did not see anywhere on the Scosche website where they sell the Tab adapter by itself.
Click to expand...
Click to collapse
What does an "MTP initialization notification" look like on the Note? How do I identify it?
If I don't see it when charging, does that mean it's getting a fast charge for sure, or just that it might be?
lastdeadmouse said:
A multimeter
Sent from my SGH-I717R using xda premium
Click to expand...
Click to collapse
How exactly would you use a multimeter to do this? From what I've seen, they have two contacts -- where would you stick those? Or is there some kind of micro USB conversion thingy to use with a multimeter?
capite said:
How exactly would you use a multimeter to do this? From what I've seen, they have two contacts -- where would you stick those? Or is there some kind of micro USB conversion thingy to use with a multimeter?
Click to expand...
Click to collapse
Cut a USB cable, and strip a portion of the power wires. Set the multimeter to a 10A DC current scale (assuming it supports 10A, but most craftsman and up do, with common and a 10A lead), disconnect the plug, attach common to negative wire and positive to positive wire, gator clips or something, then plug it in and read it. The current support and time it can be on depends on the multimeter. Mine does up to 10A for Max 30 sec.
Sent from my SGH-I717R
I'm asking this because i just tried a non-branded chinese external battery that has 1A output and it says "MTP initialization" when i plugged the tab..
Any idea which brand works for galaxy tab?
Your battery should work, but you need to buy something like this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130690906449#ht_1611wt_715, to force it to charge.
The ext batt that you have could work if yr tab is shutdown/switched off. You could use the adapter mentioned above, but... your ext batt output is 1A, the adapter increases the std USB current of 500mA to 2A, I wouldn't.
The 1A current is not the rated current for our charger. Its 2A, if you look at the charger really carefully.
If you use the ext battery while using the tab, my guess is it will drain both the ext & int battery at the same time. Or trickle charge when idle... (not sure on that).
Hope it help...
murmur70 said:
Your battery should work, but you need to buy something like this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130690906449#ht_1611wt_715, to force it to charge.
Click to expand...
Click to collapse
skycruzer said:
The ext batt that you have could work if yr tab is shutdown/switched off. You could use the adapter mentioned above, but... your ext batt output is 1A, the adapter increases the std USB current of 500mA to 2A, I wouldn't.
The 1A current is not the rated current for our charger. Its 2A, if you look at the charger really carefully.
If you use the ext battery while using the tab, my guess is it will drain both the ext & int battery at the same time. Or trickle charge when idle... (not sure on that).
Hope it help...
Click to expand...
Click to collapse
Thanks, the ext battery actually has 2 outputs, 500mA and 1A,
so i can use that adaptor,
but i prefer to use the smaller output for my blackberry..
I'll see if i can find 1A to 2A adaptor..
If I'm not mistaken the normal output for smartphone chargers are 1A, (iphones/ipods, HTCs, samsungs). Not sure abt BB, never use one. U shud check the supplied charger for the current rating. U get 500mA when you connect to a pc usb port, so charges at slower rate.
You can't just create more current with an adapter like that (unless you reduce the voltage, but that wouldn't help anyway).
I suspect that all those adapters are doing is shorting the data pins, which is what is done on most wall chargers. This makes the device think it's plugged into a charger instead of a computer.
I'd probably make my own adapter, but if you don't want to or want it to look a little nicer that should work fine. It won't charge at the same speed as with the wall charger though.
This one works even just straight cable
Im really suprise my old Callpod FuelTank Duo (500mA per port)works perfectly charging my Galaxy Tabs (gTab 7.7 P6800, gTab 8.9 LTE and gTab 10.1 4G)
http://www.geardiary.com/2009/11/16/the-callpod-fueltank-duo-rechargeable-dual-device-power-revie/
But the latest DreamGEAR i.Sound Portable Power Max 16,000 mAh Backup Battery (2.1 Amps on any single port at a time ) which I recently bought doesn't. why? But the i.Sound can charge a more power hungry iPad3 easy.
http://www.ilounge.com/index.php/re...-portable-power-max-16000-mah-backup-battery/
Im really confuse now and still wont be able to let go of my vintage FuelTank Duo because of this reason.
murmur70 said:
Your battery should work, but you need to buy something like this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130690906449#ht_1611wt_715, to force it to charge.
Click to expand...
Click to collapse
I just ordered this and will try. I also found this one and ordered one also, hopefully this will solve the charging issues using a external battery power pack
http://www.ebay.ca/itm/Micro-USB-Fe...s=63&clkid=8973626299242376794#ht_2635wt_1037
Yes that adapter is what i needed to use to get my Mypal/Energizer 18000mAh to work w/ my 7.7.
This adapter is no longer available, can someone post a link for this item pls?
I have a Mophie Juice Pack that charges up my 7.7 (and most other devices) just fine.
http://www.amazon.com/Mophie-Powerstation-4000mAh-External-BlackBerry/dp/B005OW4BFE/ref=pd_sim_e_2
The 7.7 seems to be problem in this regard. This one doesn't work either
http://club.dx.com/reviews/text/53689
Which is very odd as it works fine with my Dell Streak, in itself a difficult phone to find an external battery pack for.
I hope we get sufficient contributors so we can build a database on this.
i'm using Yaobao Powerbank 11200mah... work quite fine... link just showing the product...
http://www.imcc.com.my/store/products.php?product=Yoobao-Power-Bank-11200mAh-Portable-Power-Charger
beware that there is a fake product similar to this...
I have just finished testing a generic Zagg type item similar to this
http://dx.com/p/ac-rechargeable-600...er-w-2-usb-output-for-iphone-psp-black-129067
The top outlet designated "Optimised Charge" doesn't work but the lower outlet designated "General" does. Albeit very slowly, 1% every 20 minutes.
This is not an external battery that I would recommend in any event. It self depletes from 100% to zero in 7 days just sitting in a bag waiting to be used.
i'm using Yaobao Powerbank 11200mah... work quite fine... link just showing the product...
Click to expand...
Click to collapse
I hope this is the same one
http://dx.com/p/yoobao-external-112...light-for-iphone-ipad-cell-phone-white-133873
Actually it probably is the original according to this guide "Yoobao yb642 11200mAh Original Vs Coppy (sic)"
http://www.youtube.com/watch?v=yivfKey4uy0
There is a favourable review here - and many more on YouTube
http://www.youtube.com/watch?v=DP6FuxdCNjA
If edan1979 says it works with the 7.7 then that will be good enough for me to get one. Awesome capacity too.
yup its the same one... can recharge 2 times... but i'm using it with my other device... working well..
From what I could find, it seems that Yoobao have upgraded the Powerbank 11200mAh to the Thunder Powerbank YB-651 13,000mAh.
I have just bought a YB-651 13000mAh from Maikai UK.
There are two charging outlets, the one that works for my 7.7 Tab is USB 1 DC5v-1A and this charges at a similar speed to the Samsung wall adapter.
The other outlet USB 2 DC5v-1.5A - designated for iPhone, iPad and Tablet PC - doesn't appear to be compatible.
It is a funny old game this, why do some battery packs work with the Tab 7.7 but not others.
Just bought momax ipower pro for galaxy tab.comes with 5v 2 amp and 5v 1 amp outlets.
Also came with 2 micro usb cables and a galaxy tab to micro usb adapter..
2 Amp out let works great....
Could you please give me your opinion on which one you would get for reliability and performance? I personally do not like the hump look on my galaxy note and rather have an extra batteries or power bank when I can't find an AC outlet and for travel. I've narrowed my choice to the following (can't post links; too little post):
Hyperion Samsung Galaxy Note 2 x Battery + Charger [amazon - $19.99]
Anker® 2x2700mAh Li-ion Battery For Samsung Galaxy Note Batteries for AT&T Samsung Galaxy Note + Anker USB Travel Charger [amazon - $24.99]
New Trent IMP120D iCarrier 12000mAh Heavy Duty 2A/1A Dual USB Ports External Battery Pack [amazon - $76.95]
Extra batteries are the best method I've found ...as you can store 2 or 3 in a pocket ....then charge later when you get to a power supply ...g
Extra batteries without a doubt, I have 3 extras so at least 2 are always charged in case of emergency. Very cheap too
I use a solar powered battery backup/charger, got it for only $18 and it already saved me a bunch. Not sure if I'm allowed to post the link though, google search "Solar Powered Backup Battery And Charger"
I have the anker 2 2500ma + charger kit off amazon. Works great. 1 caveat though. The wear and tear on battery cover from.removing the back will eventually wear out the tabs that lock it in place. I have already went through one of the flip cover cases because of this. Currently using the stock cover and notice oonly a little wear at this time.
I have this and love it. http://m.bestbuy.com/m/e/product/detail.jsp?skuId=3386191&pid=1218397307007
Charges a phone and has a 2.1 amp port for a tablet. Holds 6600 mah of power so it will charge the note 2.5+ times.
Sent from my AT&T Galaxy Note
android4545 said:
Extra batteries without a doubt, I have 3 extras so at least 2 are always charged in case of emergency. Very cheap too
Click to expand...
Click to collapse
My messenger isnt working for some reason heres the battery link
http://www.amazon.com/gp/product/B0076V4ISG/ref=oh_details_o04_s00_i00
d11dog11 said:
I have this and love it. http://m.bestbuy.com/m/e/product/detail.jsp?skuId=3386191&pid=1218397307007
Charges a phone and has a 2.1 amp port for a tablet. Holds 6600 mah of power so it will charge the note 2.5+ times.
Sent from my AT&T Galaxy Note
Click to expand...
Click to collapse
Sexy
gregsarg said:
Extra batteries are the best method I've found ...as you can store 2 or 3 in a pocket ....then charge later when you get to a power supply ...g
Click to expand...
Click to collapse
I decided to get the New Trent iGeek IMP99D 9900mAh External Battery Pack with free New Trent 5200mAh. It was on special on Amazon. It seemed to be the best for portability and convenience. Had the charger came with the ability to charge 2/3 batteries simultaneously, I would have gone with the extra batteries. I rather plug once over night and be done charging next morning instead of standing by to complete charging and swapping each batteries.
http://slickdeals.net/f/5322852-New-Trent-iGeek-IMP99D-iDual-5200-mAh-Amazon-70-FS
2545 said:
I decided to get the New Trent iGeek IMP99D 9900mAh External Battery Pack with free New Trent 5200mAh. It was on special on Amazon. It seemed to be the best for portability and convenience. Had the charger came with the ability to charge 2/3 batteries simultaneously, I would have gone with the extra batteries. I rather plug once over night and be done charging next morning instead of standing by to complete charging and swapping each batteries.
Click to expand...
Click to collapse
Looks awesome :good:
2545 said:
I decided to get the New Trent iGeek IMP99D 9900mAh External Battery Pack with free New Trent 5200mAh. It was on special on Amazon. It seemed to be the best for portability and convenience. Had the charger came with the ability to charge 2/3 batteries simultaneously, I would have gone with the extra batteries. I rather plug once over night and be done charging next morning instead of standing by to complete charging and swapping each batteries.
http://slickdeals.net/f/5322852-New-Trent-iGeek-IMP99D-iDual-5200-mAh-Amazon-70-FS
Click to expand...
Click to collapse
Test results:
Using 2 Amp USB port - 25% to 99% charge took just 5 hours 7 minutes.
Using 1 Amp USB port - 14% to 100% charge took 4 hours and 42 minutes.
Using Samsung supplied charger/cable - 21% to 95% took 2 hours 7 minutes.
Conclusions:
1. No difference in charge rate using 1 Amp vs 2 Amp USB port.
2. Battery pack takes twice as long to charge than the wall charger.
3. 9900mAh gaurantees at least two full charges.
So is this what I shoud typically expect from a 9900 mAh external power pack? Please share your experience. Is there a way to increase my charge rate using the battery pack?
Hello everyone, after my battery discharged at 0% and the phone was off, I was no longer able to charge it with the connector.
Now it charged for all the night but the % is the same of yesterday. If I put it in charge in the external dock it works well.
I doubt it's the connector of the pèhone because until the battery was discharged it worked normally.
Till yesterday i used the Foxhound rom with Perseus kernel, now I use Revolution HD with stock kernel but nothing changed.
Any suggestions? Thanks
Are you using the OEM charger? They are known to be faulty/POS!
slaphead20 said:
Are you using the OEM charger? They are known to be faulty/POS!
Click to expand...
Click to collapse
yes it is
but till 3 days ago everything was ok
i have 3 different chargers and they all don't work well after the battery went down
Battery voltage has dropped too low for standard charger to initiate charging, either obtain a special charger or replace your battery (cheaper).
boomboomer said:
Battery voltage has dropped too low for standard charger to initiate charging, either obtain a special charger or replace your battery (cheaper).
Click to expand...
Click to collapse
Better to directrly put 5V on battery, but skills required
boomboomer said:
Battery voltage has dropped too low for standard charger to initiate charging, either obtain a special charger or replace your battery (cheaper).
Click to expand...
Click to collapse
but if i use the external charger by samsung with the standard charger connected on it i can recharge my two batteries normally. don't they use the same voltage?
NickyDroid said:
but if i use the external charger by samsung with the standard charger connected on it i can recharge my two batteries normally. don't they use the same voltage?
Click to expand...
Click to collapse
Charge the batterys to 100% then test the other chargers .
Could be dirty USB port poor cable .
Poor connectors .
jje
JJEgan said:
Charge the batterys to 100% then test the other chargers .
Could be dirty USB port poor cable .
Poor connectors .
jje
Click to expand...
Click to collapse
already done.
this morning i put the full recharged battery into s3
now i'm trying to recharge with another samsung recharger (this is the 3rd i use) and it went form 4% to 5% in 20 minutes
Hello, i just bought this extended battery for my i777 and i was looking forward to use both the OEM 1650mAH and the extended one together.When one is out of juice use the other while it is being charged in an external charger...and vice versa.
Will the i9100 extended battery work with i777?
Will this external charger work fine???
how do i connect the battery with the pins on the charger???
How will the charging time vary for both 3500mah and 1650 mah battery with the external charger???
i want to avoid plugging my s2 as often as possible to the ac directly as my flex cable is damged.
mmystere68 said:
Hello, i just bought this extended battery for my i777 and i was looking forward to use both the OEM 1650mAH and the extended one together.When one is out of juice use the other while it is being charged in an external charger...and vice versa.
Will the i9100 extended battery work with i777?
Will this external charger work fine???
how do i connect the battery with the pins on the charger???
How will the charging time vary for both 3500mah and 1650 mah battery with the external charger???
i want to avoid plugging my s2 as often as possible to the ac directly as my flex cable is damged.
Click to expand...
Click to collapse
As long as the correct voltage (in this case, 3.7V) is applied, you can use the battery.