The Ryobi One+ 18-Volt Lithium Ion 2.0Ah Battery and Charger Kit is just $43 right now, 52% off its $89 list price. This kit ...

We've already shown you MintyBoost, a battery-powered USB charger built ... rechargeable lithium polymer battery and throwing in the solar cell to handle the recharging. This DIY is a bit advanced ...

Breakthroughs, discoveries, and DIY tips ... called lithium-ion. As you might expect, they contain… lithium ions. As Popular Science explained in our look at Tesla’s Powerwall battery: When ...

Sure, coin cells usually last a long time — but do you really want to buy new ones and throw the old ones out? The LiR2032 coin cell is a rechargeable lithium battery, for which you can build a ...

and a rechargeable lithium polymer battery. The MintyBoost kit is a popular DIY USB charger kit that can be easily modified to work with a solar cell, making it an ideal choice for this project.