Amazon.com: (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 : Health & Household
Klarus KLARUS-18GT-36 3600mAh 3.6V Protected Lithium Ion Button Top Battery for XT11GT - Walmart.com