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Old October 28th, 2012, 09:32 AM   #1 (permalink)
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I always get an extra battery or two for my cell phone. I am absolutely paranoid about battery life (long story, there's a reason) which probably means android shouldn't be for me. Hah! Love the android os. It's fun and so much more customizable then any other os out there. So of course, the solution is to have extra available batteries just in case. I always buy my extra batteries on ebay. Way, way cheaper than in the store. My concern though is the batteries are always different mAhs then the battery that comes with the phone, i.e. I found 2900 mAh batteries for the Galaxy 3 which comes with a 2100 mAh battery (I'm going back and forth between galaxy 3, note 1 & 2) and the seller says they are normal size batteries (ugh, can't stand getting one that require fatter back, makes the phone look ugly and way less sleek). Does that damage the phone in any way? I am very good at figuring out software issues but I'm clueless on hardware.

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Old October 28th, 2012, 10:10 AM   #2 (permalink)
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No, it won't damage your phone. Think of the mAH (milli-amp hours) as the size of the fuel tank. Theoretically, the more mAH, the longer you can go, as long as the voltage is the same. A different voltage will most definitely effect your phone and possible damage it.

One thing to note is that aftermarket batteries many times don't perform to spec and over-estimate their capacity.
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Old October 28th, 2012, 10:35 AM   #3 (permalink)
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Thanks for the info. One more question. How do I know the voltage? The voltage is given on the replacement batteries but when I look up the specs for the battery that comes with the phone it doesn't give voltage, just mAh.

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No, it won't damage your phone. Think of the mAH (milli-amp hours) as the size of the fuel tank. Theoretically, the more mAH, the longer you can go, as long as the voltage is the same. A different voltage will most definitely effect your phone and possible damage it.

One thing to note is that aftermarket batteries many times don't perform to spec and over-estimate their capacity.
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Old October 28th, 2012, 10:41 AM   #4 (permalink)
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It should be printed right on the battery. I pulled a few sitting around here and they all say 3.7 volts on them.
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Old October 28th, 2012, 02:30 PM   #5 (permalink)
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Thanks, that really helps. The battery displayed on ebay (samsung battery) didn't have the voltage displayed. The replacement batteries are also 3.7 volts so I should be okay.

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It should be printed right on the battery. I pulled a few sitting around here and they all say 3.7 volts on them.
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