Incredibly well for steaming

Suited with 20 amps even for drastic sub-ohm vapors (3.7 / 20 = 0,185ohm!). Relatively high capacity but mainly very flat discharge curve (Ausgangangsspannung remains very high long), so perfect for steaming mechanical.
Wrap yourself in Dual Coil with approximately 0.8ohm, evaporate approximately 5 ml / day, mechanically. After a day (!), The battery power has waned still barely noticeable, until the middle of the second day, it will get time to switch. Hammer.
After several months of exclusive use of the two batteries in an AC load them almost as good as new.

Bottom line: In my opinion the best thing there is very suitable for mechanical steaming and also for controlled fan.