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I have been using my laptop to charge my android phone until recently when I noticed the back lid pushed to the back slightly and then the battery drains from 100 percent to 0 percent in 20 minutes. I suspect either the charging system or the battery. How can I be sure of the problem so I don't replace the battery to find out its a charging system issue?

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  • I haven't understood the problem description. Anyway, does this happen when charged from the OEM power brick also?
    – beeshyams
    Nov 30, 2022 at 12:39
  • yeah it also happens when charged from a regular charger
    – Dong Li
    Nov 30, 2022 at 13:43
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    In that case it's most likely a battery issue. Likely your device is more than 3 years old or heavily used. In any case, you are left with the option of changing the battery
    – beeshyams
    Nov 30, 2022 at 13:45
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    Yes i bought it back in 2019 and that explains why the battery should be the problem, thanks i just hope a new battery won't get drained so fast
    – Dong Li
    Nov 30, 2022 at 13:46
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    As someone who has replaced Nexus 5's battery 3 times, there are at least 2 factors: The first is one is obviously these batteries have broken (swollen), but they also broke fast due to being incorrectly charged (continuously overnight, overcharged, ungrounded outlet, etc.)
    – Andrew T.
    Nov 30, 2022 at 15:34

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