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hi just have a question, howcome my newly bought xp 2000 energizer could not fully charge my sgs2? seems that it can only charge my phone 80%.
These were the following conditions when I used XP 2000:
1. xp 2000 was at full charge
2. my phone was turned off
3. my phone was not drained, still had around 10% charge.
I noticed like around 80% of charging, a temperature icon showed blinking as if the battery was heating up(sorry i don't have a screenshot).When I tried to unplug xp 2000 from the phone, the charger no longer have lights on, as if it got drained w/o fully charging my phone..
This is my 2nd of unit of xp2000. The store where i bought it replaced the first one thinking that it might be defective but same goes for the new one..
the temperature icon I mentioned only shows up whenever I use xp 2000.
Well the Charger can store some amount less than 2000mAh of Energy. The SGS2 battery is rated at 1650mAh. So in theory you have 350mAh of additional power in the pack than you should need however the battery is still draining while it is being charged (the SGS2 can draw up to 1A current according to specs and even in the deep sleep state I wouldn't be surprised if it draws 50-100mA since the hardware doesn't support true power gating. I mention earlier that while the charger is rated at 2000mAh it can probably on store up to 90% of this value aka 1800mA.
In summary:
The capacity of the power pack is closer to 1800mAh that 2000mAh.
The phone draws significant power even in deep sleep.
There is additional power lost by transmission and charger control circuitry in both the power pack and the charge controller in the phone.
There are additional reasons but those are the main ones.
That is why you cannot fully charge it with a power pack.
Please press thanks if you find this information useful.
Poulsen8r said:
Well the Charger can store some amount less than 2000mAh of Energy. The SGS2 battery is rated at 1650mAh. So in theory you have 350mAh of additional power in the pack than you should need however the battery is still draining while it is being charged (the SGS2 can draw up to 1A current according to specs and even in the deep sleep state I wouldn't be surprised if it draws 50-100mA since the hardware doesn't support true power gating. I mention earlier that while the charger is rated at 2000mAh it can probably on store up to 90% of this value aka 1800mA.
In summary:
The capacity of the power pack is closer to 1800mAh that 2000mAh.
The phone draws significant power even in deep sleep.
There is additional power lost by transmission and charger control circuitry in both the power pack and the charge controller in the phone.
There are additional reasons but those are the main ones.
That is why you cannot fully charge it with a power pack.
Please press thanks if you find this information useful.
Click to expand...
Click to collapse
ok thank you! one rep from energizer had somewhat a similar explanation.Well, I guess I'd have to accept it as is... If only I knew, I could've bought one that has a higher mAh, like xp 4001... so sad.... anyway appreciate it!
On theory, a 2000mAh is capable of charging a 1650mAh battery as long as power is not lost through other means.
Most of these battery packs do not have a Zener Diode, you might want to modify it to add it in. This will allow your 2000mAh pack to charge your 1650mAh battery for 1 time only.
LiFE1688 said:
On theory, a 2000mAh is capable of charging a 1650mAh battery as long as power is not lost through other means.
Most of these battery packs do not have a Zener Diode, you might want to modify it to add it in. This will allow your 2000mAh pack to charge your 1650mAh battery for 1 time only.
Click to expand...
Click to collapse
How can I modify it? sorry..
I use an xp2000 with my S2 - but I think of it as a battery extender, rather than as a primary means of recharging it. I use it when I'm working & the battery's getting a little low - it can keep ahead of the phone and gives me another 3-4 hours in total. The great advantage (over a spare battery) is that I don't have to power down, so if I'm downloading, for example, and I don't think the battery will make it to the end of the download, then I just plug in the xp2000 & the problem is solved.
I have lots of different ways of charging - mains & car chargers, USB cables, spare batteries - and find the xp2000 is a useful addition that sometimes saves the day. It's just the right size & weight to be able to carry around without having to think about whether you really need it - so it's always there when you do.
If you're using any state-of-the art smartphone intensively, it helps to have a variety of recharge options, and to take advantage of any opportunities you may have to top up during the day, thus keeping ahead of the phone's discharge curve.
It was working fine before I went to bed last night, then I let it charge for the night since that battery was at about 4%, But this morning it won't turn on at all. The battery feels warm as if its been charging but nothing seems to be making it turn on. Any ideas?
re: No Poweron
labou_7 said:
It was working fine before I went to bed last night, then I let it charge for the night since that battery was at about 4%, But this morning it won't turn on at all. The battery feels warm as if its been charging but nothing seems to be making turn on. Any ideas?
Click to expand...
Click to collapse
If it was my phone here is what I would do.
First I would see if the phone charges the battery by putting the battery into
the phone and plug the usb cable from phone into the wall charger or into
the computer.
If the display on phone shows a picture of a battery charging let it charge
for an hour more or less and try turning on the phone.
If the phone is not charging the battery I would purchase a cheapy battery
charger and battery combo on eBay.
You can find this combo on eBay for less than $8 bucks shipped for both the battery and charger:
http://www.ebay.com/itm/1800m-BATTE...045605?pt=PDA_Accessories&hash=item43aa9a4465
(even if you decide to return and exchange the phone its still a good thing to have a spare battery and charger)
Check it out.
Good Luck!
labou_7 said:
It was working fine before I went to bed last night, then I let it charge for the night since that battery was at about 4%, But this morning it won't turn on at all. The battery feels warm as if its been charging but nothing seems to be making it turn on. Any ideas?
Click to expand...
Click to collapse
are you on cm7? not sure about the s2 (never had the issue), but i know that on the infuse, there was a problem (or maybe it was intentional) with low power charging mode (phone wouldn't charge when off).
i think this can be solved by trying to charge the phone via your computer usb, as opposed to your OEM wall charger.
Thanks for the suggestion. It definitely isn't showing the picture of the battery when its plugged in to the wall or the computer. I'm debating the battery charger combo you linked.
I actually am. But I have it plugged to my computer and nothings changed.
Time for some trouble shooting.
Start eliminating possibilities. You need to determine where the problem is.
From what you say, it seems possible that the battery is completely discharged but not recharging. That could be a bad battery or it could be the phone.
If you know someone else with an SGS II, try inserting their battery temporarily to see if your phone will boot. If you don't know someone else, maybe you can borrow a charged battery from the store where you bought it.
Continue on until you pinpoint the problem.
Do NOT buy a "cheapie" battery for your SGS2. Unless you want to eisk causing damage. The stock battery for the SGS2 has NFC technology built into it. Using anything other than OEM could cause damage/performance issues to your phone, and void the warranty.
Sent from my SAMSUNG-SGH-I777 using XDA Premium App
Have goh tried a battery pull? Unplug the phone, pull the battery and let sit for a few minutes to allow tbe IC's to discharge. Put battery back in and try powering up the device. Good luck.
Sent from my SAMSUNG-SGH-I777 using XDA Premium App
Similar issue and got phone fixed finally
Have had similar issue as yours. Cable charger was plugged into the phone to be charged at night and was surprised to find that the phone became hot and battery was not charged at the next morning, in fact the battery level got lower than it was before charging.
Notes:
- ROM in use: AOCP version 7.2 (Android 4.4.2)
- Kernel in use: Version 3.0.101 [email protected] #3
Here are some tests done and the observations after getting a charger with a slot to place the removed battery for charging:
1. Charging via USB cable connected to PC:
- With the phone turned on, battery charging icon is only displayed after some wiggling at the charging port. The phone got charged further to 100% when the initial remaining battery level is 90%. However, when the initial battery level was less than 50%, the battery level continued dropping ALTHOUGH the battery charging icon was displayed.
- With the phone turned off, battery charging icon is only displayed after some wiggling at the charging port. When the initial battery level was less than 50%, the battery charging icon displayed only a battery level of 1% and the battery level did not increase at all after 15 minutes of charging.
Initially suspected that it was a dead battery issue and bought an i9100 battery, I thought it was a compatible battery at first. With the i9100 battery, I repeated the above tests.
2. Charging via USB cable connected to PC:
- With the phone turned on, battery charging icon is only displayed after some wiggling at the charging port. The phone got charged further to 100% when the initial remaining battery level is 90%. However, when the initial battery level was less than 50%, the battery level continued dropping ALTHOUGH the battery charging icon was displayed.
- With the phone turned off, battery charging icon is NOT displayed but the phone screen flashed continuously, and at times the phone is turned on automatically as the USB charging port is inserted. When the phone is turned on, the charging proceeded as the above sentence.
Upon searching the forum, I found that i777 has a different battery with NFC chip and i9100 battery has reported to cause issues during charging on i777 devices. There was also a Chinese forum which mentioned that the battery compatibility issues should have been overcome in ROM with Android version 4.0 and above.
I then bought a new i777 compatible battery and tested charging via USB cable. The observations are same as the first battery as at 1.
With the battery issues possibility eliminated, I approached a phone technician to examine the phone by telling him that the phone couldn't be charged and the battery level continued dropping even with the battery charging icon displayed. The phone technician then thought that the USB charging port to be the cause of the charging issue and replaced it. The replaced part is the small metal housing where the USB cable is inserted, and is replaced by heating the old metal housing and replacing it with new part by soldering.
The phone could be charged with USB cable as usual after the part replacement and all the batteries are found to be still working fine. Ended up with 2 i777 batteries and a i9100 battery, may be I could continue using this phone for at least another 5 years down the road.
Yes it sounds like a catch-22 and that's exactly what I think it is.
Yesterday my phone battery bailed on me. So I plug it in for a night and wake up to see it hasn't charged at all. It's still off and continually displaying the battery charging icon, after which it shows the Samsung Galaxy S2 logo, after which it dies. This goes on forever.
I've tried different outlets, also my computer's USB port, but to no avail. I have the impression that it wants to be on to charge, and since it does not have enough power to start, it won't charge. Seems like the amount of power from the charger suddenly isn't enough to start, or that the device tries to start before the battery can handle it.
This evening, after not trying anything for an entire day, I got it to show the CyanogenMod logo, but it got stuck on loading. So I took it out, wanted to go into the CWM to wipe some settings and have a clean installation, but then it bailed on me again.
Now I'm back in the endless charge-start-die loop. What can I do?
Hi,
I think your battery is messed up, buy a new battery. Or make it go into recovery mode. Or, go to your nearest Samsung Centre.
Sent from my GT-I9100 using XDA Premium
Do you have a multimeter to check the voltage of the battery?
Either you will need another phone that will accept the battery to charge it or your can charge the battery externally with a lithium charger (think Remote Control cars, planes, helis)
or ebay for a new battery.
---------- Post added at 08:20 PM ---------- Previous post was at 07:58 PM ----------
BTW Lithium batteries will die very quickly i not kept above the correct voltage. Li-Ion are charged in two stages. Constant current, and then constant voltage.
Constant current is to apply 500ma at around 3.7 or 4 volts per cell till the battery voltage gets to its upper limit depending on what battery chemistry you have. Then keeping the voltage at that limit, reduce the current continually till the battery is fully charged. As I do not know the max voltage for the cell, I will just assume that 3.5v will be a safe amount.
So to charge, simply apply 3.5 volts to the phone battery for a few minutes at a time, with a resistor or light bulb in between so the current is limited, then checking it back in your phone inbetween to see if it charges.
If you are confused at the major concepts here then just buy a new battery, to save breaking you or your phone.
I'm travelling around in Asia but the local market had a place that had proper equipment. I managed to fix the battery by charging it with an external one-fits-all charger (where you can put the positive and negative leads anywhere). After that I can just use the phone again and charge it normally.
If the phone didn't try to start but would just charge the battery when plugged into the mains, this would also have worked. Anyway, I had a new battery made (I'm in China so they just pack a random battery with some rubber to make the size fit into some stickers and that works). Funny thing is, it has 1900mAh, a lot more than the original battery, though being a lot smaller in size. I hope it will last...
thanks for the tips
Hi guys,
i have the same trouble of him, and i can share you that my wife and me just bought two galaxy s2 white from France...they are totally new (two weeks ago).
Here the bug i confirm, if we are out of battery, then to plug it in the official craddle of my car, with the official charger will power on automatically the phone, then it will loop in on---off--on--of, because not enough power to keep the phone charging.
I confirm that the only way to make the phone charging correctly is to plug it with the power socekt wall charger, by the car there is no way.
It seems the difference between the car charging and the house charging is that in the car when it is plugged the phone power on auto, in the house the phone charge without powering on the phone....
Is there a way to force in the car with the craddle to charge some minutes without the need to power on it auto ??
Your battery is not dead, or in France my wife and me got the similar issue and it is really not possilbe...
Hi,
have you tried to remove the battery from the phone for at least a couple of hours and then put the battery again and plug it?. I had the same issue and doing this I could charge the phone after a couple of tries. I hope you got luck with this.
I've tried it but it wouldn't work. A separate charger (charge outside the phone) did the trick, no more problems since then.
s73v3. said:
Do you have a multimeter to check the voltage of the battery?
Either you will need another phone that will accept the battery to charge it or your can charge the battery externally with a lithium charger (think Remote Control cars, planes, helis)
or ebay for a new battery.
---------- Post added at 08:20 PM ---------- Previous post was at 07:58 PM ----------
BTW Lithium batteries will die very quickly i not kept above the correct voltage. Li-Ion are charged in two stages. Constant current, and then constant voltage.
Constant current is to apply 500ma at around 3.7 or 4 volts per cell till the battery voltage gets to its upper limit depending on what battery chemistry you have. Then keeping the voltage at that limit, reduce the current continually till the battery is fully charged. As I do not know the max voltage for the cell, I will just assume that 3.5v will be a safe amount.
So to charge, simply apply 3.5 volts to the phone battery for a few minutes at a time, with a resistor or light bulb in between so the current is limited, then checking it back in your phone inbetween to see if it charges.
If you are confused at the major concepts here then just buy a new battery, to save breaking you or your phone.
Click to expand...
Click to collapse
1 Cell lithium batteries like phone batteries are nominally 3.7v but their voltage depends on charge. They should generally be charged to a maximum of 4.2V, and not discharged below 3.3V/3V, depending on who you ask. You don't want to get it wrong though - look up what happens if you overcharge a lithium battery on youtube!
Same Problem Battery Logo Boot Loop
Has this problem been solved ?
I have the same Battery Logo Boot Loop
I have several batteries, and a separate charger ... batteries at 100%
The problem occurred while phone was in use, connected to wall charger, and had reached 100% .
I continued to use the phone while plugged into charger.
Phone shut down with a Battery Logo showing only a thin green line at bottom.
I turned phone off and swapped in a hot battery, but phone would not turn on.
Stays totally black screen, will not enter Download mode or Recovery mode.
With charger plugged in it will go into the Battery Logo Boot Loop.
The blue light next to the power button flashes, the Battery Logo appears for a few seconds then screen goes black and cycle repeats.
Any help will be appreciated.
Thanks
AnselRoe
Hi all i have a problem with my sgs2 i don't know if it is the battery the charger , Apps or charging port. When the battery gauge shows 1% i can't charge my phone it stops to 2% when i plug to usb it can't connect as mass storage properly and when even the phone shows full charge then i unplug it battery gauge falls suddenly to 60% as an example i have try changing two usb cables same issue plz help
The forums are all filled with comments from (more or less experienced) people complaining that recharging their S3 might be at times strange with a certain ROM or another - and while maybe 10% of the time that might be indeed the case, in 90% of the cases it boils down to problems with CHARGERS and USB CABLES.
Right now it seems that the amount of power used for recharging is controlled primarily by S3 itself using at least 3 levels - of which at least two can be fine-tuned in software (and some kernels expose those features).
There is an "AC charger level" (set around 1000 mA), an "USB level" (set around 500 mA since USB1/2 standard does specify that) and a 3rd "low level / safety level" which seems to be around 50-100 mA.
The S3 seems to be choosing the level based on BOTH the charger and the USB cable used - and I have seen the same charger showing a different level with different USB cables, and the same USB cable showing a different level with different chargers. I have even seen one AC charger that with a very specific cable (not the one bundled with it) was showing "charging/USB" inside the S3, while all other cables on the same charger were showing "charging A/C".
So when your S3 charges very-very slowly your very first check should be with another USB cable, and second check should be from a different charger or USB port - instead of posting same questions again and again around here
IMHO the absolute safest charging combination right now is with the original Samsung USB cable from the USB port (ideally in a good notebook - good notebooks have very effective USB protection, and some - like the Thinkpad models - have an USB port that can power something even when the notebook is stopped, and with one extra BIOS setting even when the notebook is stopped and not connected to A/C)! This is not the fastest charging combination - and with an extended battery it might take like 9 hours for a full-full charge (4 hours with normal battery) - but is most likely the safest (simple) one! Also by charging with a smaller current the heat generated is (much) smaller and the "aging" of the battery is drastically reduced.
If you are in a huge-huge hurry you might want to use the original Samsung A/C charger plus the original Samsung USB cable, but don't "overdo it" by trying forced/exotic solutions/chargers - we even have an entire thread around here at XDA with "sudden death" cases - most of them observed in the morning after the i9300 was left overnight in some A/C charger
EDIT:
Also if you see a very-very slow charge (or even a discharge) while you are "charging" but you have the screen ON and the CPUs running at full speed you should know that is possibly normal - since screen ON + CPU at 100% is draining more than 500 mA (= probably most of, or more than you are getting from the cable); try to lock the phone or even power it off, and then after 20 minutes see if the battery is better and by how much.
EDIT2:
As a far later step if everything else fails you should also check if the pins inside the USB connector in the S3 are not bent in any way, but that is slightly more advanced and might not be perfectly fixed without replacing the connector.
Also if your phone has other serious hardware problems (cracked screen or so) you should mention that first.
EDIT3:
My stuff above was "educated guess" - now we also have 'hard technical data":
http://www.maximintegrated.com/app-notes/index.mvp/id/4803#5
Nice topic thanks for comprehensive content. I have been experiencing slow charges since i get my S3. I read about a guy, whos charging cable is officially changed by Sammy with a 5-pinned one, and fortunalately found a same type of cable. Since i started using that cable full charges take approximately 2 hours while using the original one results in 4 hours or so.. I also informed my local samsung service about the issue but they refused my explanations saying that there is no such an official report about the faulty original cables.
I was frustrated about dischages while playing games when the phone is plugged in. IMO this is one of the biggest fail for a phone to be discharged while plugged in.. But now it is completely fixed.
Sent from my GT-I9300 using xda premium
ggnoplay said:
Nice topic thanks for comprehensive content. I have been experiencing slow charges since i get my S3. I read about a guy, whos charging cable is officially changed by Sammy with a 5-pinned one, and fortunalately found a same type of cable. Since i started using that cable full charges take approximately 2 hours while using the original one results in 4 hours or so.. I also informed my local samsung service about the issue but they refused my explanations saying that there is no such an official report about the faulty original cables.
...
Click to expand...
Click to collapse
The math is just right - 2000 mAh battery = 500 mA * 4 hours = 1000 mA * 2 hours.
My original usb + charger takes 5 to 8 hours and it has 5 pins !!!!
also I tried another 5 pins usb with the same original charger and it takes around 2:30 to 3:30 hours
So I need to buy a 5 pin usb one but how to guarantee it will work ????
xclub_101 said:
IMHO the absolute safest charging combination right now is with the original Samsung USB cable from the USB port (ideally in a good notebook - good notebooks have very effective USB protection, and some - like the Thinkpad models - have an USB port that can power something even when the notebook is stopped, and with one extra BIOS setting even when the notebook is stopped and not connected to A/C)! This is not the fastest charging combination - and with an extended battery it might take like 9 hours for a full-full charge (4 hours with normal battery) - but is most likely the safest (simple) one! Also by charging with a smaller current the heat generated is (much) smaller and the "aging" of the battery is drastically reduced.
Click to expand...
Click to collapse
I agree with this... in one night i used to recharge my S3 with a Blackberry Charger. Guess what? The digitizer went up like crazy, started to write crazy stuff (just 'zeroes' 00000). i immediately dissconected the charged and the digitizer when back to normal.
zeromant said:
I agree with this... in one night i used to recharge my S3 with a Blackberry Charger. Guess what? The digitizer went up like crazy, started to write crazy stuff (just 'zeroes' 00000). i immediately dissconected the charged and the digitizer when back to normal.
Click to expand...
Click to collapse
Yes, I have also seen something similar once with a very bad low-cost Chinese charger.
I also wanted to add some "hard" info to this thread - my stuff above was "educated guess" but in the meantime the full info become available and I added a link below with it (coming recently from the Perseus kernel thread) - as it can be seen from there there are basically 3 modes (but with the first one by default starting in 100mA, so this one should be either 100 if something goes wrong or go to 500mA).
http://www.maximintegrated.com/app-notes/index.mvp/id/4803#5
This is a very informative post. Recently I have been experiencing weird battery behavior on my s3 as well and wanted to investigate further.
I have 2 original Samsung batteries and using an original Samsung OEM charger to charge my S3 and Grand i9082. (both uses same 2100mah battery)
Now both the batteries and the charger charges and holds the current fast and long in case of grand i9082. (gives me more than 24 hrs on average usage and almost a day with wifi, cellular data on for dual sim, along with moderate messaging and youtube) no Issues at all on both these batteries and charger.
On my s3 it's a different story.
In 2-3 hours the same batteries die if I watch a movie on s3, it goes from 100 to 10.
(on airplane mode. lowest brightness, maximum wakelocks restricted, google services frozen, Maximum CPU frequency down to 400mhz settings enabled)
if I use it just for calls and moderate messaging, it last 12 hrs.
on airplane and standby mode together, it goes on for 24 days.
weird thing is If the device goes below 30% battery and I plug in the AC charger, and use the phone, the battery would still be discharging instead of charging.
on safe mode, the battery will neither go up nor go down, no matter how long I keep using it while connected on charger, it would stay at the same 10%.
while if I plug in for charging while it's above 30%, and keep using it, it would be charging normally.
sometimes the s3 would treat the AC charger as a Normal USB cable, while if I remove and put it back again, it would show me charging/AC.
Now going through this post
"There is an "AC charger level" (set around 1000 mA), an "USB level" (set around 500 mA since USB1/2 standard does specify that) and a 3rd "low level / safety level" which seems to be around 50-100 mA."
Great find. actually. what I conclude from this post and in my case, the s3 while it goes below 30% it fails to charge/ or chooses not to charge on "AC charger level" and would always choose the "2nd USB level" or the "third low level", resulting in drain while using the device at the same time, while if left idle it would slowly charge on the 2nd and 3rd level until 30% then moving on to the actual AC charger level at 1000.
this issue I guess can be sorted out with some kernel side changes.
perhaps setting a lower Maximum boot CPU frequency (1000mhz?) and a lower default GPU frequency.(this can also sort out few heating issues) and lower default brightness level as well (or maybe not, it's just a hunch and I am no master myself.)
Anyways thanks for the useful input.
Hello
So my screen was broken and I decided to replace it.
I unmounted all the parts and remounted them very carefully and now I have a clean new screen ....
... but now the phone doesn't charge anymore. I tried several USB cable and charger, but the result is the same when I plug an USB cable :
- The phone vibrate and wake-up from sleep mode
- The batty icon shows the lightning bold on it like its charging
- But, the percentage charge does not increase even if I let it several hours
- When I go in Battery settings of Android, it says that battery is not charging.
- When the phone is turned off, I only see the battery percentage level and NOT the lightning bold
Do you know how I can detect the default part to replace ?
Thanks again for any help.
I Think the battery is damaged.
I used Ampere and the usb cable is well detected but battery is still discharging.
I ordered a new one.