On Thu, 23 May 2013 12:32:54 -0400, Frank
<
frankdo...@comcast.net> wrote:
>On 5/23/2013 10:01 AM, rbowman wrote:
>> Stormin Mormon wrote:
>>
>>> Duracell: had four D cells, looked just like the Duracell
>>> D cells I can get at the store. (One was dead, other three
>>> were fine. But, it's not possible to change just one battery,
>>> so the whole pack would had to be thrown away.)
>>
>> Why don't you try taking apart a NiCd D cell for scientific purposes? I
>> never did but I'd read once that inside every D rechargeable lives an AA.
>>
>Single AA or three or four in parallel?
I took one apart. Single AA cell. The tip off before I opened it was
that the Ahr for both sizes was the same.
>Whatever, is funny.
>I remember my first surprise in opening a 9 volt cell to find six AA's.
>They could build a 9 volt cell without all these extra wrappings but it
>is obvious that they are doing what is cheapest for them to do.
A battery is, by definition, a collection of cells. (Same as an
artillery battery is a collection of guns.) If it has a terminal
voltage higher than a nominal 1.5 V**, then it's a number of cells
connected in series. Always has been; always will be.
The only difference you might see going into the future is the cells
inside may be something you recognize separately instead of the cells,
custom made for the application, they historically used.
** Excepting some chemistries that aren't commonly used like lithium.