Source 3.7V 4.2V 3A Li-ion Lithium Battery Charger Over Charge Discharge Overcurrent Protection Board for 18650 TP4056 DD05CVSA on m.alibaba.com
5V 2A Type-C USB 3.7V 18650 Lithium Li-ion Battery Charging Board DIY Power Bank | eBay
Tenergy Charger for 3.7V DC Li-ion Battery - Tenergy
UltraLast Lithium Ion 18650 3.7 V 2.6 Ah Rechargeable Batteries and Charger Set UL1865K-26 3 pk - Ace Hardware
Amazon.com: 18650 Battery Charger 4 Bay Smart Universal Charger for Flashlight Headlamp Battery 3.7V Rechargeable Lithium Li ion Batteries Compatible 18650 26650 21700 10400 Battery Charger (Only AC Charger) : Electronics
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Li Ion Battery Charger Circuit Using MCP73831. | by Perceptive-ic | Medium
Amazon.com: ICR10440 Lithium Ion Rechargeable Battery 3.7V 350mAh with USB Charger (2pc Button top +Charger)(They are not AA Size Battery) : Health & Household