NiMH power weight ratio

[[email protected]]

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.

 

[Phil Allison]

** Groper alert

Just wondering if anyone knows the weight of these batteries?

AAA 900mAH
AA 2500mAH

or will they vary between manufacturers?

** Of course they vary, by make and by capacity.

I'm trying to work out whether 4 x AAA or 2 x AA has the better power
to weight ratio.

** The 2500 mAH AAs win, hands down.




........ Phil

 

[[email protected]]

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.

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.

 

[[email protected]]

** Groper alert





** Of course they vary, by make and by capacity.




** The 2500 mAH AAs win, hands down.




....... Phil

Sure, but not by much...

AA : 2300 (or 2500) mAh/oz
AAA: 2250 mAh/oz

 

[Phil Allison]

AA, 2300 mAh NiMH Energizer: 1.0 oz
AAA, 900 mAh NiMH Energizer: 0.4 oz

** See:

http://data.energizer.com/SearchResult.aspx


AAA = 13 gm.

AA = 30 gm.

Weight ratio = 2.3

Energy ratio = 2.56


http://sanyo.wslogic.com/moresearch.cgi

AAA = 18 gm

AA = 30 gm

Weight ratio = 1.66

Energy ratio = 2.56


" ** Of course they vary, by make and by capacity. "





......... Phil

 

[[email protected]]

Sure, but not by much...

AA : 2300 (or 2500) mAh/oz
AAA: 2250 mAh/oz

In which case I may well go for 4.8V (4 x AAA) into my step-up converter