On Sat, 31 Dec 2005, Russell McMahon wrote:

>> Unfortunately things have gotten much worse.
>
>> For example: at my local home depot they sell name brand NiMH
>> rechargeable batteries (right now I don't remember which, but it is one
>> of the big two). The AAs have a capacity of 2200mAh. Guess how much
>> capacity the D cells have? Yup, 2200mAh!??!
> ...
>
>> At least they're truthful about the capacity, but IMHO that's just
>> slimey. Those "D" cells are MUCH more expensive then the AA cells, yet
>> the have the same capacity. People buying those batteries as a
>> replacement for alkaline D cells must really get ticked off to realize
>> they last probably 1/3 as long.
>
> A good modern Alkaline true D cell typically has > 15 AH capacity, or just 
> under 7 times the AA cell's 2.2 AH capacity.

Doesn't capacity scale with weight, and volume (and with the square of 
the diameter for cylindrical cells) ? How about price scaling ? How much 
for a 'real' D cell vs a 'real' AA ? 7 times more ? Probably not.

I sort of started this thread so I add my take on 'reputable' cells: I 
buy from a reasonably small shop which specializes in batteries and I 
buy well-known types which are featured there for more than a year or 
so. I did get burned a few times but not so bad (the price was right). 
Bad batteries get rotated out pretty quick from such a place because 
nobody buys them a second time and the owner can't afford to ruin his 
reputation by pushing them on to mostly professional clients.

Peter
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