What should I use to charge my smok stick v8 battery? What voltage output can/should I use? Do I need to use the USB cable it came with, or can I use longer cables that I have? And I have a Samsung quick charger and ones that are slower. And I have outputs with 5V/1A and 5V/2.1A Which would be better? I don't want to mess up my battery and I'm not really sure the best way to charge it.