The 3.88V 3880mAh Battery for Samsung Galaxy S21 5G G991 Compatible (EB-BG991ABY) is a replacement battery for your Samsung Galaxy S smartphone. This battery has a capacity of 3880mAh, which is higher than the standard battery that comes with the phone. This means that you’ll be able to use your phone for longer before needing to recharge. The battery is also compatible with the S21 5G G991, so you can use it as a replacement for that phone as well.
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