3.7V ICR18500 Li-Ion Rechargeable Batteries Flat Top with USB Charger (2pc+Charger)(They are Not 18 * 65mm Battery) : Health & Household
Amazon.com: 18650 battery
Amazon.com: XTAR VC4S 18650 Battery Charger 4 Slot li ion Fast Charger with 18W QC 3.0 Wall Charger Max 3A for 10440 16340 18650 20700 21700 32650 Ni MH AAA AA C Battery Charger Test Batteries' Real Capacity : Electronics