14500 3.6V 850mAh Lithium-Ion AA Size Rechargeable w/Wire Leads
Amazon.com: funkawa (2- Pack) CR-AA, AA Li-ion 3.7V Rechargeable Batteries Button top with USB Charger, Good for Flashlight Lumintop Tool AA 2.0, Klarus Mi7 : Electronics
4/8/12x AA 14500 3.7V Li-ion & 3.2V AA LiFePO4 Rechargeable Batteries | eBay