Amazon.com: OHKEIYOY 4 pcs 3.7V 3800mAh Rechargeable Lithium ion Battery,18650 Li-ion Battery 18650 Flat Top Lithium Ion Battery for Doorbells, Large Capacity Battery for LED : Health & Household
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: VICTAGEN Universal Lithium Charger 18650 for 3.7V Li-ion Rechargeable Batteries 18650 18490 18350 17670 17500 16340(RCR123) 21700 Ni-MH/Ni-Cd A AA AAA : Everything Else
EBL Smart Rapid Battery Charger for Rechargeable 3.7V Li-ion IMR Batteries 26650 18650 17500 14500 16340(RCR123), Ni-MH/Ni-Cd AA AAA C Batteries ( Batteries Not Included)