That’s interesting. It’s true that in this business you don’t get bored and it’s only a matter of time before one encounters another unexpected problem that renders months of work completely useless… 
I just realized this device is useless for the testing because the fans are affecting the cell temperature when the FANS are kicking on. The cell receive ventilation from the fans affecting the cell temperature results.
Not recommended because this reason. I am going with the other method to keep an accurate temp result and also if testing over 20A to keep a more accurate result since the other device is rated for 60A.
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Just cover the cell with some sort of shield
It could be an option but having the other setup that is super capable I guess I am going in that route for most accurate results but absolutely will try your suggestion to have more testing capacity at the time. Thanks for the suggestion.
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Just bought some to test in my Convoy L21’s and M21’s.
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You won’t regret, this is the real thing. It’s the battery that finally jacks my Nightwatch NS14R v2 across 20000 lumen for Turbo output. Very obviously higher than any other battery I have.
Most significant difference seen only with extreme high-output ~10000 lm lights though. In lights with less power demand, the boost is not as noticeable. (My testing is not on JP40, but its twin the AM04 battery from 18650-21700 website.)
You can get the Ampace JP40 from my store. DIY500AMP.COM
Ampace JP40 (LT21700A) - Ultimate Performance Tab-less 60A 21700 Batte
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Great pricing. Fantastic battery at such reasonable cost.
Here a short video showing the largest stock in the US of Ampace JP40. This is just a sample of my Inventory.
Very nice. Shipping from the US?
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Yes located in Tallahassee FL. DIY500AMP LLC. Free Shipping over $50 orders the faster shipping in the US.
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it says sold out now, when will you restock?
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In about 2 weeks or less.
you ship to outside US?
They are back in stock.