How to Build a 18650 Lithium Battery Charger and Booster Module
Geeks Living Off The Grid Are Hard On Batteries | Hackaday
How to make a Supercapacitor Charger Circuit
MCP73871 Solar Lithium Battery Charging Module DC 5V Lipoly Polymer Charger Board with Capacitor for Outdoor Power Bank DIY : Amazon.ca: Industrial & Scientific
Rechargeable Super Capacitor Battery : Working & Its Applications
Capacitor, Capacitive Battery Charger Circuit. | Miscellaneous Circuits and a link.