This rechargeable battery is easy to use and connects to HealthVape's vitamin-infused pods.  Directions Insert HealthVape nicotine-free pods into the top of the rechargeable battery. The device is equipped with an automatic sensor, so there are no buttons to push, the battery will activate automatically when you breathe in; and it will automatically stop when you stop breathing in.Charging the DeviceAttach the USB charger to the bottom of the battery body, and plug into a USB wall charger and the device will automatically start charging. When the device is charging, the indicator light will turn on on. The indicator light will automatically turn off when the device is fully charged.Technical SpecificationsSize: 82.5*15.5* 7.5 mmBattery capacity: 220 mAhResistance: 2.O ohm  Includes  1 Rechargeable Battery 1 USB Charger