Adafruit Micro-Lipo Charger for LiPoly Batt with USB Type C Jack : ID 4410 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
18650 Battery Charger Case Fast Charging DIY Portable Mini Power Bank Digital Display Box Mobile Power Supply with Night Light - AliExpress
USB Power Bank Case Kit 18650 Battery Charger DIY Box Shell Kit Black For Arduino molewei - AliExpress
Amazon.com: 2 Pack 18650 Battery Charger Protection Module, MELIFE Power Bank PCB Module Board, Dual USB 5V 1A 2.1A with BMS Protection DIY Mobile Charging Accessories Digital LCD Display Indicator : Everything Else
Amazon.com: AITRIP 20PCS Boost Step Up 5V 1A Power Supply Module Lithium Battery Charge Protection Board 134N3P DIY Charger USB and Micro USB Port with LED Display : Electronics
Amazon.com: DROK® Mini USB DC-DC Step Up Converter 3V to 5V 2A Mobile Power Supply Charger Board with Battery Indicator for Tablet PC iPad iPhone Charging DIY : Electronics
Amazon.com: AITRIP 6PCS 2A USB 18650 Lithium Li-ion Battery Charger Module Boost 3.7V to 5V 9V 12V Adjustable DC-DC Step Up Boost Module TP4056 DIY Kit Parts : Electronics
How to Make a DIY Battery-Powered USB Charger « Null Byte :: WonderHowTo
DIY Shell USB Type C Power Bank Case 12*18650 Detachable Battery Charger Support Flat-Head Battery Fast Wireless Charge _ - AliExpress Mobile