I did quite a bit of reasearching without finding much data for rechargeable
cells. The cells I bought from TNR Batteries are FDK America brand, made in
Japan (not just the lowest price I could find on Shenzhen/eBag).

I've modified circuit boards and battery compartments in plastic housings
before, not a big deal with a Dremel/rotary tool. And when it's an older
device, newer cells generally have more capacity in smaller cells, so it
works out easily.

When I'm making up new battery packs I don't have any trouble with exact
sizes because they don't have to fit in an existing hard plastic space. I
use plastic sheet stock on the sides and shrink thick skins on them, because
they can go into belt pouches.

I've only noticed one other instance where a little extra NIMH battery
length made it a little more difficult to insert/remove AA NIMH cells in a
charger.. yeah, they were from a discount store, off brand.

There will obviously be variations in dimensions of any particular size of
cell, and even some China manufacturers specify size tolerances for their
cells (Tenergy).

The issue I brought up was that there doesn't seem to be any concise
listings of different cell sizes, not their exact dimensions and tolerances.

For almost all *letter* sizes of rechargeables, there are generally several
sub-sizes.

We've never seen more portable devices than there are presently. It's a bit
curious that battery size comparisons and datasheets/information seem to be
so obscure.

--
Cheers,
WB
..............


"William Sommerwerck" wrote in message
...
The following is not meant sarcastically or personally.

In trying to adapt CR123A lithium cells to a Polaroid 360 designed for
PX-24 alkaline batteries, I had to insert several brass washers to make up
the difference in length. Differences of a fraction of a millimeter don't
seem important.

My experience with Chinese batteries is that the manufacturers don't care
about the exact dimensions. The batteries are sometimes too fat to fit.