Bench Test Results: Vapcell Red T20 – 40A 2000mAh 21700…good performer but low capacity

Test Report Summary: This cell is a pretty good performer but its low capacity means a very short run time compared to the Molicel P42A or Samsung 30T if you go under 3.2V or so. It equals the Samsung 40T down to about 3.3V but below that the 40T’s higher capacity holds its voltage up better.

This cell gets as warm as the P42A, 30T, and 40T but its low capacity (shorter run time) means it doesn’t have a chance to heat up as much so it could possibly have a 40A rating. The 60A “max” rating is undefined and useless, ignore it. Cycle life matters when setting the current rating but I have not tested its cycle life and I do not know how its overall life span compares to other cells.

The two cells I tested delivered 2062mAh and 2101mAh. This is not great consistency but it is typical of cells from some China manufacturers and exceeds this cell’s 2000mAh rating.

Two cells were donated for testing by Vapcell ( Thank you!

Ratings graphic: Imgur: The magic of the Internet

Full Test report:

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These tests only note my personal ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

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Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

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To see how other cells have tested check out this link:


Are there any records of people making high power low(ish) energy packs to be high performance but still flight safe? I’ve been fascinated by the idea of a 1P ~1kW pack, toyed with the idea of getting Samsung 25Rs or something for the 20A continuous current output and cheaper price, but the extra 500mAh per cell limits you to 10 or 11S and and still relatively low current so this could be a lot of fun to give both higher voltage and currents.

I know TSA isn’t really gonna like any homemade pack, and if you’re making a label yourself already you can just lie and say a bigger pack is 99Wh to some extent, but the idea of flying with a plug and play pack that could go in a really small and light board with the option to throw more in a backpack while still actually being legal makes me grin

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I don’t remember seeing any posts about a build like that but I’m sure someone has. :slightly_smiling_face:

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look up N.E.S.E packs.
You can take out each cell individually. Or the entire P group if the airlines allow it