I was at my local Frys and they had these Tennergy cells for $12.99 each. I was tempted, but funds are tapped right now, maybe in the future. They have weld tabs though so you’ll have to remove them. Tennergy has a pretty good reputation, no history of re-shrinking used cells, grossly exaggerated specs…etc. On the back of the packaging it spec’d a 6A draw steady state and peak draw (short burst) 8A.
They also had 2 others that were 3.2V Li-Po (safer chemistry), but they were lower current draw, and unsuitable for my applications.
Interesting. I wonder if the underlying cell is the same source as as the King Kong? In addition to 18650 cells at Tractor Supply, this is only the second time I've seen/heard of Li-ion being sold at retail.
very interesting information on the last pages, thank you. I didn’t have much time for my FandyFire HD201 since April, in the meantime the 26650 cells got quite popular I think.
I have two Sony LiMn 26650 (made by Molicell?), which delivered easily more than 6 amps in the HD2010 (Maximum= seems to be direct drive). Minimum voltage is 2,5v, maximum 4,2v. I think, in earlier days, max. voltage used to be 4,1v with nominal voltage of 3,6v, but now you can charge them with the normal lipo programm.
I have different RC Model chargers, for these batteries I use the small charger:
this one works very precisely, but some of the cheap chargeres like IMAX aren’t very precise, so be careful
this is the battery:
Sure, the capacity isn’t that massive. But the maximum discharge is 10c (!!), so you could get up to 25 amps, which is a lot. So far no problem at all with them, will buy some more probably. They are safe and powerful. Some shops in Germany sell them, like lipopower.de, an other guy sells them on ebay.
AFAIK these type of batteries are used for Sony Laptops (the smaller 18650), and the bigger 26650 have been around a while, used for power tools, and lately for electric bicycles. There aren’t so many different manufacturer for lithium batteries, most of them in china. Molicell is an Canadian company, but of course manufactures in China.
Some years ago, the “Konion” batteries have been popular amongst RC hobby people, but are hard to get nowadays. I would like to get one of the 26700 cells. Here’s a comparison of these batteries (in German):
thanks again for all the interesting information, for me, 26650 are the future. More amps, higher capacity, and like the sony/emoli, pretty safe.
The only problems I had with batteries so far were NIMH Cells, which burned and exploded. so I think, they all can be dangerous to some extent. I would never buy myself some (fake?) batterys from an unknown shop. They probably get damaged due to the high power LED we use nowadays, ’cos they can’t stand the high current draw.
Picked up an Ultrafire blue protected 26650 3.7V labled as 6000mah. Has been thru 6-8 cycles so far. Maybe I’m doing something wrong, but the capicity seems WAY lower than advertised.
Here’s dicharged from full at 1.0A. 1677?!!?
I’m in the market for a 26650 cell with better numbers. Might as well run an 18650 with a spacer…
Welcome to BLF, LED A. Stray! Now don't exaggerate; there's only 3,122 links in this thread.
You might also try some of the IMR Unprotected, which are supposed to be a safer chemistry. Powerizer 4000mAh from Batteryspace seems to be the best price on these.
A8 is a great light. Fancy Flashlights has a killer combo deal which includes the A8, TF 5000 cell and charger. HKE sells the A8 as a standalone. Good luck with all your new toys.