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Comment by linmob | Hacker News Reader

My Newton MessagePad 2100 used 4 AA batteries, the Palm m105 used 2 AAA batteries, so this used to be possible with monochrome displays.

But: Watt hours (Wh) are quite low for these NiMH rechargebles. I think what would be preferable would be a standardised size of phone-fitting Li-Ion batteries that manufacturers are required to use.

(I highly doubt that this will ever happen, though.)

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pretty sure >10 years ago I had an array of aftermarket Li-Ion batteries for the Samsung Galaxy S2, which were able to be quickly swapped in and out when needed. there were same sized ones with slightly higher capacity than the one the phone came with, then there were double thickness ones with double the capacity that came with their own replacement battery cover. think they went up to 5000mAh. there were the usual Chinese 'gold' and 'fire' brands, but you could also pay a bit more for Japanese. they all worked and never swelled or exploded. perhaps I was just lucky. those were the days..

Years before, the typical (at the time very common at least here) Motorola MicroTac and later models:

https://en.wikipedia.org/wiki/Motorola_MicroTAC

had a battery which was the actual "back cover" (it was connected to the phone via sliding), and everyone had at least two batteries, there were all kind of slim to bulkier sizes.

Some of them (medium sized) simply contained 5 (Ni-Cd or Ni-Mh) AAA batteries.

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