Amazon.com: Tenergy TN471U 2-Bay Universal Battery Charger with LCD for Li-ion/NiMH/NiCD Rechargeable Batteries, Micro USB Input, Portable Charger for Batteries Sizes 18650, 16340, 26650, AA, AAA, and More : Electronics
Amazon.com: 18650 Battery Charger 4 Bay Fast Charge, for 3.7V Li-ion TR IMR 10440 14500 16650 14650 18350 18500 16340(RCR123) Batteries, USB Intelligent Universal Rechargeable Battery Charger : Electronics
Amazon.com: 16340 battery
Amazon.com : WEGWANG 3.7V 123 Lithium Rechargeable Batteries 4 Pack 800mAh Li-ion Battery Compatible with Arlo Wireless Security Camera VMC3030 VMS3130 VMS3330 VMS3430 VMK3200 : Electronics
Amazon.com: 2 Pcs 3.7V Rechargeable 1/2AA Lithium ion Battery icr14250 300mAh (14.5 * 25mm, NOT AA or AAA) : Health & Household