A feature-rich DIY circuit for charging 3.7V Li-Ion batteries and visually monitoring their charge level with a 10-LED bar graph. Incorrect LED Indication All LEDs light up regardless of battery ...

As the original poster explained, their authority having jurisdiction told them only "certified solar installers" could install solar panels under the National Electrical Code. This meant their ...

Ajay has worked in tech journalism for over a decade as a reporter, analyst, product reviewer, and editor. He got his start in consumer tech, breaking Android news at Newsweek before going to PCMag, ...

Jean-Marie Tarascon ponders on the value of lithium, an element known for about 200 years, whose importance is now fast increasing in view of the promises it holds for energy storage and electric cars ...

Protect your eyes as you watch this month's partial solar eclipse with our guide to purchasing safe and certified solar eclipse glasses. When you purchase through links on our site, we may earn an ...

The new TCW 40R SDD is a solar direct drive vaccine refrigerator, specially designed for small to medium size health centers, working straight from solar panels with no batteries and no regulator ...