Looking for rechargeable C size batteries do they use a different number or is it just C also which is a good one to look at. Thank you in advance
if you mean nimh, then they are just C
you can also get adapters to make AA cells go where Cs are needed - if you do not need the extra energy of the C size
AA nimh are easy to find, amazon has them
if you mean li-ion, i am not sure there is an exact C size - votage would be too high, for one thing, to replace old style C cells
wle
Here is a LINK to an article that has tested some of those.
This in NOT done as an approval of the choice they made, but just for the naming of brands.
Other brands (in alphabetical order) are: Ansmann, Camelion, Duracell, GP Recyko, and Varta.
So there is a lot to choose from.
Are you just interesed in replacing alkaleaks by their NiMH counterparts?
Or may I suggest that the diameter of a (1.2/1.5V) C-cell equals that of a (4.2V) 26650 Li-ion.
In that case you have to work something out about the difference in voltages and lengths.
C is just C, but can be sized as HR14.
Getting a product worthy of the price is somewhat problematic. Depending on your stock of AA and willingness to deal with the C-adapter you aren’t a whole lot worse off going that way.
The top end like the Soshine C Size Rechargeable Batteries NiMH 5500mAh, or Tenergy Centura NiMH C 1.2V 4000mAh Rechargeable Batteries, generally don’t live up to their specs. I’ve had both for years, they are decent enough but after awhile are more like 3000-4000.
(Note - Do NOT buy the Tenergy ‘blues’, they are lousy.)
No experience with the Tenergy Premium 5000mA, but I doubt they’d actually do better than the Centura.
I’ve got some old generic looking blue Sanyo NiCad I picked up at an electronics store years ago for about $1, and they are still damn near as good.
Looked at the Wiki ‘review’. Tenergy blues for top cell? No evidence of actual testing? I’d not give that site much weight.
I’ve had Powerex AA and D. Good batteries. The C size is damn expensive on that link.
Slightly better price with excellent customer service: https://www.thomasdistributing.com/Maha-Precharged-2-Pack-C-Cell-5000mAh-NIMH-Low-Discharge-Rechargeable-Batteries_p_2461.html
I just picked up 8 Tenergy Centura C cells (for $30 shipped). So far I have capacity tested 4 of them and all came out slightly above their 4000mAh rating. We will see how they other 4 do — and how they all do over time.
alternatively you could get size C to AA converter casings and run off with eneloops
The others already mentioned several brands of C-sized NiMH rechargeables.
If you don’t want to have to buy a charger that accepts larger cells, then AA-sized NiMH rechargeables are the same length, and can actually beat alkaline C-cells for current output. Runtime will be shorter than C-size rechargeables, though.
You can buy premade adapter sleeves. Or, I think 3/4” PVC pipe has about the same size outer diameter as a C-cell, and a few wraps of electrical tape could take up the the difference in size between the AA and the inner diameter of the pipe sleeve.
C cells are typically around 25 mm in diameter and no more than 50 mm long – 26650’s are usually too wide to fit in a C cell light. Single 18650’s or 21700’s will fit in a 2 or 3 C cell light using adapters.
I’ve got parallel adapters that I use to burn down moribund alkaleaks, 3×AA for a D size, and 4×AAA for C size.
NiCd never liked being in parallel, but I think NiMH is fine.
Not optimal, but would work in a pinch, though.
nimh are fine in parallel, but you can’t charge them with smart charger that way, it will not terminate charge properly, dumb timer chargers do work, i’ve done it several times,
Nah, I’d only charge Li-ion in parallel, never NiCd/NiMH.
> Note – Do NOT buy the Tenergy ‘blues’, they are lousy.
A few years back there were deep discount sales on Tenergy “blue e” D and AA cells.
They were crap. I saw someone speculating that a shipping container had sat too long in the hot sun and baked a big batch.