My sister's phone drains while charging. It will usually go up to 31%, but then later it goes down. I find nothing wrong with phone, charger, or outlet. I can't seem to find the solution to fix this. I have tried everything from cleaning the phone to restarting the phone a couple times.
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Not an easy solution here, as it might be a bad charger, which should be easy to rule out wit any other charger you have around with a Usb port.. or a bad battery, if the replacement charger doesn’t fix the issue. Replacing battery is a bit more troublesome, but it can be done, have a look at the guide. Last possible reason would be the charging circuit, but that’s not a DIY job, you’d need to find a Pro for that.
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Hi,
What happens if you charge the battery with the phone switched off?
Does it charge to 100%?
If so how long does it take to discharge with normal usage?
Have you tried installing and running an A/V (Anti Virus) or an anti-malware app to check if the phone has a virus or malware installed that may be operating in the background, thereby draining the battery unnecessarily? (Avast for mobiles and Malwarebytes for mobiles are two good free apps to try but there are others that may suit you better).
by jayeff