Brought for those times in very cold temps were low internal resistance is key, this cell has amazing low IR and also have a higher capacity version for warmer temps.

It's big

Very happy with the specs and performance of these batteries.
Am running them in hybrid connection mech tubes with dual coil builds around .12 ohms and get hours out of them before swapping batteries.
Also like to add that i was especially happy with Vapr fulfillment and dispatch time of this order.
Thankyou also for the free keychain, it was a nice little surprise :)

Best 21700 battery.

As always VAPR fast delivery and great products, what can be said about these batteries except they are a powerhouse of AMPS :D