$53.99 9v Battery Kratax 2-Packs 850mAh Li-ion Rechargeable Battery, for Smoke Alarms, Guitar, Cameras 
Amazon.com: 9v Battery and Charger Kratax 2-Packs 850mAh Li-ion Rechargeable Battery with 2 Slot 
Amazon.com: AA Rechargeable Batteries Kratax 3500mWh High Capacity Double AA Lithium Battery 1 
