Here's an interesting answer about batteries of the Sony Reader in another thread:
Quote:
At least first cycle until the message appears about a low battery. These types of batteries need to initialize their capacity. Normally three full cycles would be the best with this type of battery but because it's so long lasting I just went for one complete cycle.
After that you can charge it whenever you want but you should at least fully discharge it every 30 times or so to initialize/reset the battery. This will be better because otherwise the battery indicator on your reader screen can be wrong in the capacity that it's showing and can cause the reader to think the battery is low while in real it maybe hold 25% or so. Also it is better for the battery itself.
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