Check Battery Voopoo Drag VOOPOO Drag S3 Kit Don't Toss Your Vape in the Trash! Vapes and e cigarettes contain batteries and hazardous materials that can harm the environment and pose fire risks if not disposed of properly. Check out Guide to Vape Pen Battery Light Colors Select Vape Pen Batteries Instructions: How to Use MUVATEGLOBAL This is how you check batteries without a tester., No tools., Do this:, Drop the battery vertically, Listen and watch how it lands, Heavy thud = usable, Springy bounce = time to replace, Take charge of battery safety when using e cigarettes GOV.UK