[Review] XTAR 1.5V AAA rechargeable batteries

[joenc]

@flydiver

An average NiMh = 700+mAh. There is simply NO WAY to put the same kind of capacity in that little can with the electronics as a NiMh.

Don’t forget to account for energy density. NiMH power density per cell runs around 170-420 Wh/L; Li-ion cells pack 250-670 Wh/L.

[flydiver]

@joenc

@flydiver

An average NiMh = 700+mAh. There is simply NO WAY to put the same kind of capacity in that little can with the electronics as a NiMh.

Don’t forget to account for energy density. NiMH power density per cell runs around 170-420 Wh/L; Li-ion cells pack 250-670 Wh/L.

Understood…but, I think the critical part is what it DOES as a 1.5v battery. That’s what it’s designed as, that’s the bar it has to live up to. How it gets there is another issue.

I have yet to see ANY AAA of them put out more than 400mAh on a capacity test. Numerous individual cells I’ve tested barely make 300mAh at 0.2A draw (some don’t make 300 ), which is pretty pathetic. There’s a LOT of variation in the AAA. The size makes them pretty challenging to make I think.

AA don’t have quite as much volume penalty with the electronics stuffed in the ‘can’ so they can do 1600mAh+ but many fail at higher current draws.