Amazon.com: 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 Charger, 2 Bay Smart Universal USB Battery Charger for 3.7V Rechargeable18650,26650, 18500, 17335, Ni-MH Ni-Cd A AA AAA IMR Batteries,Power Bank (Batteries not Including) : Electronics