Batteries for mods, Batteries for Electronic Cigarette Le Petit Vapoteur Which eGo battery to pick? The Ultimate Guide to 510 Thread Batteries and Vaporizers Hamilton Devices 2x GS EGO II 2200mAh OR GS EGO III 3200mAh Battery **Dual Pack** With Eco Smok Vape Store Vapes use lithium ion batteries, and leaving them plugged in once fully charged can be a fire hazard. You shouldn't leave vapes charging unattended, or while you're asleep or for that matter