Nitecore NL2150R 21700 Battery with USB-C Charge Port
Amazon.com: 8 Bays Charger USB C Battery Charger XTAR VC8 Type C 3A Fast Charger 8-Bay Smart Charger LCD Display for 3.6V 3.7V Li-ion 1.2V Ni-MH C (Package Not Including Battery)
Amazon.com: Nitecore UMS2 Intelligent USB Dual-Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 AA AAA and More Batteries, with LumenTac Battery Organizer : Electronics
Amazon.com: XTAR 21700 Battery Charger VC2L 18650 Charger 2 Slot 2022 Version with LCD Display Max 2A Rechargeable Liion and AA Charger Not Included Any Batteries(VC2L) : Electronics