Amazon.com: 18650 Battery Charger 4 Separate Universal Charger for 3.7V Li-ion Rechargeable Battery 18650 18490 18350 16340 14500 21700(RCR123) Ni-MH Ni-Cd A AA AAA AAAA : Electronics
Amazon.com: 2 Pcs 3.7V Rechargeable Batteries 1/2AA Lithium ion Battery icr14250 300mAh (Flat Top, 0.57 * 0.98inch, Shorter Than AA and AAA : Health & Household
Amazon.com: PKELL ICR18500 Rechargeable Li-Ion Batteries 3.7V 1400mah with Flat Top for Flashlight,Solar Garden Light(4pc)(They are Not AA,AAA Size Batteries) : Health & Household