Amazon.com: URBU BRC 18650 Lithium Battery 3.7V 3000Mah Rechargeable Lithium-Ion Battery for Power Bank, 6 Pieces : Health & Household
3.7V 6800mAh 18650 Li ion rechargeable battery is used in shavers, outdoor headlights, portable fans, remote controls, etc.|Replacement Batteries| - AliExpress