I have noticed that the batteries come in different amps, and I am assuming like any electronic is isn't good to under amp your device. I can not find in my Smok XCube mini 75W manual anywher where it talks about how many amps the battery needs to be. I am using a Uuwell Crown tank with a 0.5 dual coil. The cheap batteries that I used with my old Kanger set up are getting hot in this device and are not lasting very long. Does anyone know what the minimum amps are?