I've been vaping for over a year but still feel like I'm new to this sometimes. This might be a dumb question but I just buy the bare min. of supplies because I can't spend a lot of money, so is there just one charger that I could buy that will work well for any battery I have? I like to buy a new battery here and there when I have the extra money but they don't seem to work well. Thought maybe it was my chargers. I have the usb and the old one with the cord. I have old reg batteries, diamond, and the stealth batteries. Thanks for all the info on here, I just couldn't find an answer to this.