Cheap DIY 18650 Lithium Battery Charger | Mountain Bike Reviews Forum
Build a Lithium-Ion Battery Charger on Arduino | μF
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
How to Make a Lithium Battery Charger - YouTube
DIY Solar Battery Charger for 18650 Li-Ion Batteries - ElectronicsHub
How to make a Lithium Ion Cell Charger (18650 Cells Charging Grid) - YouTube