Amazon.com: 1.2v NiMH Rechargeable Battery 2/3AAA Size 400mah with Flat Top 4pcs(Not AAA Size Battery) : Health & Household
Custom NiMH Battery Pack: 12 V 300mAh (10x2/3AAA, off set)
Batteries : Battery Rechargeable NiMH Pack 4.8 V 350 mAh ...
Low Voltage Power Solutions: Battery Holder - 3 AAA Battery Case - Triple AAA Battery Holder for Arduino, Lilypad Circuits, Cosplay, Costumes and Decorations - Set of 2 - Walmart.com