How to fix samsung A02s battery after it inflates
Samsung A02s battery inflate solution
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Samsung A02s battery inflate solution
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Obviously you know you'll need to replace the battery. Sorry to say that iFixit doesn't have a guide for your phone, but there's a Spanish site called Nadie Me Llama Gallina that has just what you need.
Manuals / Samsung Galaxy A02s / Battery
You can look around for a replacement battery; most of the major sites like Amazon, eBay and AliExpress will probably carry it. Here's the first one that came up on my cursory search.
That should do it; let us know how it goes!
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