King Kong 26650 is HARDCORE! 4525mAh and it's first cycle only!

68F/20C. Since I intend on using these in the JM07 PRO, this is really highest amperage test I needed to see, but for the sake of science I’ll push them harder tomorrow. :slight_smile:

EDIT: Another interesting thing to think about is the additional POWER of the 26650. Its not just the Ah, it is the watt hours. We've got 3.1Ah 18650s and the 26650 only bumps it up over 4Ah, BUT if you take voltage into account, the story is a little different.

Now I'm making up my own rules a bit, but If I compare my best Panasonic 3100 to my MIDDLE KK 26650 at 3A and cut it off at 3v the power is 8.90Wh vs 14.82 Wh. That means in that particular example, the 26650 has 66% more power than the 18650. If the cut-off was set lower the 3100 would gain a little on the 26650, but I think 3v is reasonable. The advantage is also very similar over a Sanyo 2600.

I like the king kong name, sounds awesome

Well, temperature plays a small but noticeable part. If you are discharging a JM07 at 20 deg C ambient @ 3A, the cell would definitely discharge at at least 50 deg C after 10 minutes. :) My JM07 does 2.6A, btw.

If you look at all Sanyo official discharge graphs for Li-ion batteries you will notice that at 40 Celsius the result capacity is larger than at 20 Celsius.

http://battery.sanyo.com/en/product/lithium-ion/pdf/01/UR18650F.pdf

Yeah i saw the same for Panasonic. All XM-L lights of this size definitely would be pretty hot after 10 minutes unless you are below freezing.

That is good to know, I thought ( I thought wrong) at high temps they would work worse than at at 20º for example as normally heat in electricity is related to losses.

No real shockers here. They just keep cranking out the juice. :)

5.0 Amps

Cell #1: 4130 mAh

Cell #2: 4073 mAh

Cell #3: 4238 mAh

Just a heads up - when I click on the graph to get a larger image, I actually get an image of 5A Callie Kustoms 3100mAh discharge curves.

Wow!

The 10A testing here:

Result 4156mAh.

Wow Wow! We need a 26650 5 x XM-L soon.

I wonder if those MNKE IMR-26650, can hit the 20A and still give 3800mAh.

20 amps, the springs, switch and components would smoke first probably...heh.

Actually > 5A it is already not in the realm of budget lights already, but stuff like Elektrolumens, Lambda, HID searchlights with relays built in for switching. (my HID has a 10A rated relay in it)

There would definitely be serious problems for something like that. However I'm interested to know what that battery can do.

20A is quite a big current, as far as I know they handle correctly SST-90 DD which is around 10A.

My apologies. I fixed the link.

Thanks.

Sorry for annoying you again, my friend tested the protected pana 18650, but his charger cuts voltage at 3.35V which is not what I understand it should, and there is no way to modify the parameters manually, you can only place the battery chemestry and that is all, it starts discharging at 1A.

Would you let me know of a good charger where he could modify it manually?

Thanks in advance, and sorry for the off topic.

I would highly recommend the Jun-Si iCharger range of chargers.

thanks for this review

i was just about to buy some new 18650 for my bike light pack

i was considering the Panasonic NCR18650A but for 10 cells my battery pack was a touch expensive when i saw the king kongs

and then found this review i know these are larger cells in dia at least

with the larger capacity i could cut down the amount of cells and related components

i could cut my pack down to 8 cells just have to consider the size but you have given me another option to consider