The 650 mAh USB pass through Haka battery will delivery great battery life that can be paired with most 510 threaded tank systems. An average pack a day smoker will often get around 3-5 hours of use on a single battery charge. This battery will give you the ability to vape on your device while it’s charging, eliminating the need to carry around multiple batteries a day! A 2 color LED light behind the button will also give you indications of how much battery life you have remaining on a single charge. With a 5 click on, 5 click off safety feature this battery can safely be carried with you in a purse or carrying case and is excellent to have on hand. The Haka battery is available in four fun colors; Black, Grey, Chromatic, and Coffee.