2x ICR18500 3.7V 1400mAh Li-ion Rechargeable Battery Flat Top for LED Flashlight | eBay
Watson Lithium-Ion Battery Pack (3.7V, 1800mAh) for HD B-1801
Mobile Phone, Telephone Battery Replacement for Alcatel 10000058, 3BN67332AA - 1000mAh, 3.7V, Li-ion - Electropapa
3.7V Lithium Battery Charger Protection Board 5V 1A 2A Li ion Lipo Battery Charging Protect Two in one Module Micro USB Type C|module 5v|module boardmodule charger - AliExpress
4pcs Batteries LED 18650 1200mah Li Ion Battery 3.7v Lithium Rechargeable Battery Blue High Capacity For Flashlight|li-ion battery|rechargeable batterybattery 3.7v - AliExpress