Galaxy S7 fast battery drain issue, won’t charge properly, other issues

Hello everyone and welcome to another #GalaxyS7 troubleshooting article that answers some questions about charging, battery drain, and other boot-up issues. We hope you’ll find this post useful.

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy S7 swollen battery, won’t charge after battery replacement

Hi so recently I noticed that my phone was having trouble keeping a charge for its usual time. After about a week and a half ,it began overheating when charging and the battery would last about 1.5 hours of use. During this time I noticed that the back of the phone was bulging so I assumed the battery was swollen. As the back piece was already open, I pried the rest of it open and the battery was swollen. I ordered a new battery off Amazon. When the new battery came in, I took out the old swollen battery and put in the new battery. I had to replace the battery, following the instructions in this youtube video. However, after replacing the battery , whenever I tried to charge the phone, it kept vibrating and showing a white charge sign. It kept turning on and off as if the charger was not connecting to the phone. I’m not sure why it will not accept the charge. Do you have any advice? I also am not sure what Android Version it is currently running. Thanks! — Keisan

Solution: Hi Keisan, Too much bulging of the battery often results to problems because the motherboard can suffer physical damage as it bends and stretches. This is the main reason why it’s not advisable to allow the battery to bulge for a long time. We don’t know the extend of the bulging but it’s possible that the circuitry may have been affected, resulting to some parts becoming disconnected or shorted at this time. We suggest that you let a professional check the motherboard to see what’s causing all the symptoms you mention here.

Problem 2: Galaxy S7 fast battery drain issue, won’t charge properly

My phone from Thursday has just started not to charge properly. I used another Samsung charger and it charged perfectly then I continued to use my original Samsung charger and it is charging perfectly until it got to 70%. I’ve since tried other chargers and they won’t work at all every night my phone will charge and it gets to 70% and turns itself off charge but if I leave it on charge it doesn’t drop below 70% either. My phone is draining quicker than usual now too. — Paige Burgess

Solution: Hi Paige. Try to recalibrate the battery first to see if that will fix the problem. Sometimes, Android can lose track of remaining battery levels so the best thing that you can do first is to see if retraining the operating system in reading battery level helps. Here’s how:

  1. Drain the battery completely. This means using your device until it powers down by its own and the battery level reads 0%.
  2. Charge the phone until it reaches 100%. Be sure to use original charging equipment for your iPhone and let it charge up completely. Do not unplug your device for at least two more hours and also don’t use it while charging.
  3. After the elapsed time, unplug your device.
  4. Restart the device by pressing and holding the Power and Volume Down buttons for about 10 seconds.
  5. Use your phone until it completely ran out of power again.
  6. Repeat steps 1-5.

Perform a factory reset

Should there will be no difference at all after recalibrating the battery, the next good troubleshooting step is to see if there’s a software glitch causing the problem. You can do that by doing a factory reset.

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Battery drain issue

The most common reason for many smartphones losing battery power fast is apps. The more apps are installed, the higher the chance of something encountering abnormal fast battery drain trouble. Although there can be another reason for your problem, you should consider uninstall or disabling least or unused apps. Remember, the lesser the apps, the better it is for your phone in general. If you tend to install apps impulsively, you must exert effort in getting rid of unimportant apps. If your phone has a small number of apps already (be sure they’re all good and updated), try checking this link for more tips.

Problem 3: Galaxy S7 random reboot issue after accidental drop

I have recently dropped my S7 and it fell hitting the top of the phone. no physical damages and when i picked it up it was down so i turned it on and it everything seemed fine until i noticed it constantly shut down whenever it bumped into the slightest thing but would turn back on and recently Ive had to bump it a couple of times before it would turn on when i held the power button. I’m thinking it might just be the battery since when it wouldn’t turn on and i had to bump it a bit it still shows the battery being charged when i plugged it in. I’m not to sure what it is and i was wondering if you guys would know? — Gracehuangruiying

Solution: Hi Gracehuangruiying. If this issue only started after the phone was accidentally dropped, you must have your phone checked by Samsung Service Center or by an independent repair shop to see if there’s a broken circuit somewhere, or if there’s a part that needs replacement. There’s no software diagnostics that you can do to fix a physically broken hardware. It wouldn’t hurt though if you’ll perform a factory reset first before sending the device. This will ensure that you return all software settings back to their known working state. If a software glitch is the reason for the random restart issue, which is very unlikely, factory reset should help you fix it. Here’s how:

  1. Create a backup of your important files.
  2. From the Home screen, tap the Apps icon.
  3. Find and tap Settings and then touch Backup and reset.
  4. Tap Factory data reset and touch Reset device.
  5. If you have screen lock feature turned on, enter your password or PIN.
  6. Touch Continue.
  7. Tap Delete all to confirm your action.

Problem 4: Galaxy S7 not charging properly, won’t hold a charge

My phone seems to be have on-going issues charging and holding a charge. Oftentimes it doesn’t register when I plug the charger in, and sometimes it will, but goes in and out of charging unless the phone is completely still. Even then, it doesn’t always keep charging. The battery is draining at a quicker rate as well, at times it is worse than others, sometimes draining at a rate of up to 1%/minute. The final issue is that sometimes the phone will just turn off out of the blue if it’s been jolted around a bit, as if the battery popped out. I can usually turn it right back on without having to touch the battery. I bought this phone in Canada, and these problems originated upon moving to Ireland. Please advise. — Bryangirard4

Solution: Hi Bryangirard4. Your phone may have some hardware trouble, probably with the charging port, the battery, or both. Like Gracehuangruiying above, we recommend that you let the a professional assess the hardware to see if there’s something that can be done to fix it. This is the only solution for this case.


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