Nitecore i4 Battery Charger - 4 Bay Intellicharger
Amazon.com: Nitecore D4 Digital Smart Battery Charger for Li-ion Ni-MH Ni-CD with 12V DC Car Adapter, NBM40 18650 Battery Magazine & EdisonBright Battery Carry Case : Electronics
Nitecore UMS4 Intelligent USB Four-Slot Superb Battery UMS4 B&H