Our Bay Smokes branded Battery is compatible with any 510 thread vape cartridge, easy to charge with the included charger or any android charger. The battery is travel-sized and easily fits into any pocket. Great for discreet use. Take advantage of the low temp and pre-heat functions! We generally recommend low temp hits (white) so you get the most flavor and smoothest hits! Pro-tip; use the pre-heat function to get an ultra-low temp hit (double tap button). The light will flicker while it’s preheating and you can begin inhaling after a second or two and you will get a great flavorful hit! Tap the button once to cancel the heat, otherwise pre-heat function runs for about 7 seconds. On/Off (tap 5 times) Multi-Voltage function (tap 3 times to change) high, medium, and low. White is low, Blue is medium, Red is hot Preheat function (tap 2 times). Recommended not to charge more than 2 hours to preserve the life of the battery. Short- circuit protection Overcharge protection