Quote:
Originally Posted by gtriever
Actually, it does. At levels at or below 2.5VDC, the batteries can "die" and cannot be safely recharged. Most devices with Li-Poly batteries will have a protection circuit built in to prevent discharging at levels less than 2.7 - 3.0VDC. I'm assuming the Kindle has that circuit as well, so you're partially correct.
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ALL consumer electronic devices running lithium polymer batteries will have low voltage protection as over discharged lipos are quickly damaged and can be a fire risk. From the users point of view when the battery reaches the low voltage limit set by the circuit it's effectively empty so no, it does not make a difference when you charge it.
Quote:
Originally Posted by wvcherrybomb
For some stupid reason I was under the impression that it was best to not charge until battery was completely dead. I would much rather charge it often and keep it full but always felt guilty about doing so.
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That's a very common misconception and not stupid at all. NiMH batteries which used to be much more widely used in consumer devices have a 'memory effect' which basically means if the battery doesn't reach it's full and empty points it forgets where they are meaning you have a smaller and smaller range of usable battery. Lipo batteries like those in the Kindle have no memory effect so you can safely charge them whenever it's convenient.