SpareOne: Forget the Smartphone, This Phone Runs on an AA Battery - ABC News
Amazon.com: Rechargeable AA Batteries with Charger,Hixon 3500mWh AA Rechargeable Batteries,1.5V Constant Output,1500 Cycles Rechargeable Lithium AA Batteries,CE/ROHS/PSE Certified[4xAA+1xCharger] : Health & Household
Use your iPhone to control any AA-powered device with this simple $10 adapter - 9to5Mac