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does AC help prolong battery life?
li-ion battery has limited recharge cycle, something like a few hundred recharges then the battery will die, i don't know whether sony sells battery ereader uses, it could mean after a few hundred charges ereader will be dead :P
i noticed even if your battery is drained, when you hook up the AC power, the battery indicator goes to full, i wonder in that case, does the ereader get the power directly from AC (bypass the battery all together), which seems to be rational things to do. if that's the case, when we read at home and by the power, keep AC power hooked on means not using battery that will help prolong battery life?
just a thought :P
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