So what batteries are out there?

[boondongle]

Since it seems like it might be useful in planning mods, I've been trying to determine what cylindrical rechargeable batteries are for sale. So far, I've found:

10440 (AAA size) - 3.7v
14250 (LS1425, 1/2 AA size) - 3.6v
14430 (4/5 AA size) - 3.7v
14500 (AA size) -3.7v
14650 - 3.7v
14670 - 3.6v, 3.7v
15270 (CR2) - 3.0v, 3.6v
16340/17340/17335 (CR123) - 3.0v, 3.6v
17500 - 3.7v
17670 - 3.7v
18350 - 3.6v, 3.7v
18500 - 3.7v
18650 - 3.7v
25500 - 3.6v, 3.7v

Got any more I missed? Notice any errors in my list?

[Shreck]

see text in Red below

Since it seems like it might be useful in planning mods, I've been trying to determine what cylindrical rechargeable batteries are for sale. So far, I've found:

10440 (AAA size) - 3.7v
14250 (LS1425, 1/2 AA size) - 3.6v
14430 (4/5 AA size) - 3.7v
14500 (AA size) -3.7v
14650 - 3.7v
14670 - 3.6v, 3.7v
15270 (CR2) - 3.0v, 3.6v
16340/17340/17335 (CR123) - 3.6v 3.0 volts are available also
17500 - 3.7v
17670 - 3.7v
18500 - 3.7v
18650 - 3.7v
25500 -3.7 or 3.6 volts

Got any more I missed? Notice any errors in my list?

[boondongle]

Excellent, thanks! I've updated the list.

[Dave Rickey]

18350, only comes in unprotected (although Cisco will be getting a small order of 3V protected ones, and I have a contact for 200 MOQ 3.7V). The commonly available version is 3.7V. Same rough length as the CR123's, but the slightly larger diameter has a disproportionate improvement to actual capacity, it's likely to become a substitute for CR123's especially in "convertible" mods that can take 1 18650 or 2 CR123's. Same cell used in the 601 ePipe.

--Dave

[boondongle]

List updated. Thanks, Dave!

[Scottes]

Too bad you can't get any 5v batteries in similar sizes... <sigh>

[googled]

Too bad you can't get any 5v batteries in similar sizes... <sigh>

Yup, maybe we should make up a 5volt battery co-op and get some 'samples' made . Problem is we'd probably need a custom charger too.

[Scottes]

Well if we're going to go through that much trouble, let's get LiPo and get them at 5C.

[Cisco]

Yup, maybe we should make up a 5volt battery co-op and get some 'samples' made . Problem is we'd probably need a custom charger too.

No such animal in Li-Ion, its either 3v or 3.7v, with a few 3.6 and a few 3.2 in the mix. The chemical makeup is the limitation. If you see any li-ion in any other voltage, its either multiple cells or some sort of boost/resistance regulation. The difference between 3.6/3.7 and 3.0/3.2 is the anode core is made up of either coke or graphite.

Cisco...

[Dave Rickey]

The only way to get anything close to 5V would be 4 x NiMH (1.2V each) in series. Battery chemistry determines voltage, and you can't just mix up whatever you want. Step-up/Step-down electronics on top of 3.7V/6V/7.4V is the only way to get a 5V supply without a fistful of batteries.

--Dave