Honey Oil’s batteries will power any 510 threaded vape cartridge. With a solid feel in the hand, this stainless steel battery features a flush mounted power button and a micro USB port on the bottom. No need to carry around a USB adaptor anymore. Just plug it in like your phone and vape while it’s charging. The 380mah battery holds enough charge for 500+ hits and lasts for multiple days. This is a variable voltage battery with 3 power settings and a 10 second pre-heat function. Use the pre-heat function to warm thick oils before taking a rip. Adjust voltage to increase or decrease flavor and vapor production. Pre-heat: 2 volts Low: 2.7 volts Med: 3.2 volts High: 3.7 volts Batteries come 90% charged and include a 1 meter micro USB cable, plus a Honey Oil sticker inside each retail ready box. Battery Dimensions: 11 x 88mm