Sub-AAA (1/2 AAA, 1/3 AAA etc.) all chemistries

Batteries and Chargers Rechargeable Batteries
1

After seeing the new CQG S3 which uses 1/2 AAA 1.2V cell I started looking for other specialist sizes (updated with different chemistries).

Ni-MH

Conrad sell quite a range, mostly Emmerich:

Microbattery sell a range of GP:
http://www.microbattery.com/tech-gp-industrial-mh.htm

In the UK there is Batteries Plus:

JLS Batteries sell a selection of GP, Infapower and Sanik (2/3 AAA):
http://stores.ebay.co.uk/JLS-Batteries

Component Shop sell Vapex separately and in packs (will need to desolder them):
http://www.componentshop.co.uk/1-2v-210mah-nimh-1-2aaa-single-cell.html
http://stores.ebay.co.uk/Component-Shop

Li-ion

Lighthound has some info on li-ion sizes (approximate) for reference:
10180 battery - 10mm x 18mm (1/3 AAA size)
10280 battery - 10mm x 28mm (1/2 AAA size)
14250 battery - 14mm x 25mm (1/2 AA size)
14500 battery - 14mm x 50mm (AA size)

GP make some li-ion too, see this catalog for part numbers:
http://www.gpina.com/pdf/miniature.pdf

CN Quality Goods have 10180 cells for the DQG Spy:
http://www.cnqualitygoods.com/goods.php?id=1989

Lithium primaries

Small Battery have these:
ER10250 1/2 AAA Lithium Thionyl Chloride battery 3.6 V

Nkon carry two brands of 1/2 AAA primary, Tadiran and Saft:

Any other notable brands and stores?

2

I have some Old-Lumens mini-mags that I use three or four 3/4 AAs in.

3

Some interesting sizes. The capacities seem ok but at only .2C discharge. I wonder what draw they can sustain.

4

Max draw is hit and miss on small cells. They are generally rated really low and some have been proven to tollerate upwards of 5x their c rating, but again it’s hit and miss. Discharge curve is the only way to know for sure.

Im looking at some small Lithiums and it can be overwhelming……

5

I’d like to do a solitaire with a 10180 but even 350mA would run it down too quickly so it would probably have an lm317 (sot223) and resistor set to ~100mA.

6

My 3x 1/3AA battery, made by GP.
Used in a SK68, more light with NiMH.

7

fyesilova, are those GP 1/3 AA cells Li-ion or Ni-MH? I wonder if it is detrimental to the brightness on AA after using 14500. How are you charging them?