Just wondering if anyone knows the weight of these batteries?
AAA 900mAH AA 2500mAH
or will they vary between manufacturers?
I'm trying to work out whether 4 x AAA or 2 x AA has the better power to weight ratio. The batteries will feed a step-up converter whose efficiency depends on the input voltage, but I can work that out myself.
** Of course they vary, by make and by capacity. ** The 2500 mAH AAs win, hands down.
....... Phil
Oh why not... I've got a postal scale from the days I used to sell stuff on eBay.
AA, 2300 mAh NiMH Energizer: 1.0 oz AAA, 900 mAh NiMH Energizer: 0.4 oz
Interestingly, a 2500 mAh NiMH cell also weighs 1.0 oz.
-- Michael Darrett, Senior Computer Resource Specialist Wireless network setup, computer upgrades and repair. Sacramento, California
Sure, but not by much...
AA : 2300 (or 2500) mAh/oz AAA: 2250 mAh/oz
-- Michael Darrett, Senior Computer Resource Specialist Wireless network setup, computer upgrades and repair. Sacramento, California
** See:
AAA = 13 gm.
AA = 30 gm.
Weight ratio = 2.3
Energy ratio = 2.56
AAA = 18 gm
AA = 30 gm
Weight ratio = 1.66
Energy ratio = 2.56
" ** Of course they vary, by make and by capacity. "
........ Phil
In which case I may well go for 4.8V (4 x AAA) into my step-up converter
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