KeepPower 5200mAh IMR26650 High Discharge

Batteries and Chargers Rechargeable Batteries
21

To me, the key spec is the internal resistance, but that's very subjective based on the test equipment, method, etc. So HKJ would be the ultimate source for that spec, since you can compare it directly with so many other cells he's tested the same way.

The discharge curve for the 5200's at 5A looks pretty good, but maybe not quite as good as a KK 4200 from HKJ's chart, but pretty close. So for single cell in a DD light, maybe it's not great, but should do well. I'm thinking more in terms of using it at 6-7A in a 3 cell 9x LED light, or a J18 at 6-7A drain. I think it would do pretty good, and the high capacitiy is a big plus in that setup as well. The SONY 26650's do the best of course, but these would last twice as long.

22

You will have to wait some weeks for my test. I do have the battery in queue, together with a lot of other batteries.

23

Thanks HKJ! We are so dependent on you... Smile In looking carefully at that 5A discharge curve, it is darn close to a KK... at 6-7A of course it may change. 15A is pretty useless I assume, but maybe it will be good up til 10A - only a guess at this point. I'm not gonna ask Calvin to do anymore testing.... Smile

24

@HKJ, do you plan an review on VTC5 and if you do what is the general ETA?

BTW Thanks alot Calivini, this is highly appreciated.

25

I plan on reviewing a 2600mAh cell with 30A rating from Keeppower. I expect to publish the result in a couple of weeks.

26

I didn’t know Calvin was Italian :stuck_out_tongue:

27

Тhank you!

28

Oh its Calvinl lol :smiley:

29

This could very well be the case. After years of being only somewhat better than 18650s in terms of capacity, it finally looks like someone is willing to take the 26650 to the next level.

30

Try again! It’s Calvin IS for Illumination Supply. You know, the business he owns? hahaha

31

Yea, I would’ve thought there would be at least close to a proportional increase in capacity with respect to volume increase.

32

Capacity density is decent for cells produced in China.

33

You mean claimed capacity of course Smile. No doubt there...

34

If only claimed capacity was real, but even that would pale in comparison to the NCR18650B. The NCR18650B has ~0.21 mAh per mm³. A comparable 26650 would have ~7100 mAh. The 5200 mAh 26650 is comparable to a 2400 mAh 18650.

35

Which would be fine if the 26650’s held up under load half as well as low density 18650’s.

36

LOL!

37

Co-own. Maybe I'm secretly Italian and didn't know it, I've had people call me Vinny before. Anyways here's a combined graph:

38

Thanks :slight_smile:

39

@Calvin i’m sorry and thanks for the graphs :slight_smile:

40

Thanks for the graphs.