Envie Infinite 9V 500 Mah Li-ion Rechargeable Battery with in-built Micro USB Charging Port
Infinite is a Ready to Use and Rechargeable battery like Alkaline Batteries, you can use it straight from pack. No need to charger before use. 500mAh capacity 9V li-ion battery with USB Charging port Can be charged by Power Bank, Wall Charger via Micro USB port.