Actually eReaders tend to use Li-polymer batteries whic are likely to outlast the reader for most people... and, as readingglasses says, can be replaced, some easier than others... and as for needing recharging in the middle of a book (catlady) it doesn't happen unless you're careless... I recharge around every 7-10 days when battery indicator drops to 1 or 2 bars... and I charge overnight when I'm asleep... don't read much when I'm asleep so I've never needed to recharge whilst wanting to read at the same time plus most eReaders will let you read while charging from a wall charger...
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