Rechargeable Aa Battery 3.7v 1100mah - (pack Of 2)
Kratax 3.7V Li-Ion Rechargeable Batteries 9250mWH Lithium Battery 2 in 1 Phone Power Bank for Flashlight, Doorbell, RC Toys - Walmart.com
Amazon.com: PKCELL ICR10440 Lithium Ion Rechargeable Battery 3.7V 350mAh with USB Charger (2pc Button top +Charger)(They are not AA Size Battery) : Health & Household
4/8/12x 3.7V 3.2V AA AAA 14500 18500 Li-ion Rechargeable Battery for LED Lights | eBay