PWM Solar Battery Charger Circuit | Homemade Circuit Projects
DIY Solar 18650 Charger with Emergency Light - Engineering Projects
zener - Design a Li-Po battery charger with small solar panel and charger controller with embedded MPPT - Electrical Engineering Stack Exchange
Solar Power Li-Ion Battery Charger Circuit
Amazon.com: Solar Charger, 20000mAh Solar Power Bank, Portable Solar Phone Charger Waterproof Cellphone External Battery Packs with Dual LED Flashlights for Outdoor Camping Travel : Cell Phones & Accessories
Solar Battery Charger Maintains High Efficiency in Low Light | Analog Devices
Solar Battery Charger Circuit using LM317 Voltage Regulator
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits