In article s.com,
Eldor wrote:

Hello all NG

I am looking for a fake AA battery, i.e. a conductor of the same size,
so that I can put it in an AA battery holder and have a lower voltage
(N-1 x 1.5V) . Actually I want multiple of them so that I can make a
"configurable voltage" battery.

I have looked around but I can't find it. Does anybody know any?

Alternatively I could look for a battery which can be charged at various
voltage levels, but it needs to hold a significant charge at any voltage
level. I don't think it exists.

Thanks for any help

As an alternative, Radio Shack and other suppliers have AA and AAA
battery holders, in say 3-cell and 4-cell configurations, with movable
contacts. This permits you to use different numbers of cells, or choose
between parallel and series configurations, just by slipping the stamped
metal contacts out of one groove and into another.

I designed a little gadget for a customer using a 4-cell AAA unit. I set
it up for 3-cell operation, and use the 4th slot for a small circuit
board. The boxes come with a cover and an integral ON-OFF switch. Pretty
handy. They're about $2 each at Radio Shack, and I pay about a $1 each
in 100 pc. qty. from Mouser, etc.