This project was an update to the original Lithium Heavy Duty Kit. It was designed as a "real world" solar USB charger able to charge up most large and small USB devices. This version featured a 5W panel and several battery options. It's often referred to as the "adult" version of our popular Solar USB Kit.

Difficulty:

Build Time:

Instructions
Lithium_Heavy_Duty_2_Instructions

Buy
This kit has been discontinued. Consider the Solar USB Kit for a similar project. Individual parts can be purchased at the links below.
6V 830mA Solar Cell