Your best bet, sans solar, is to get a variable voltage lab power supply with a volt and amp meter built in, that goes up to at least 40V. Set it to 40V, connect the battery, and watch the current.

When you are wheeling the backcountry for extended periods of time you may need auxiliary battery power. Of course, your 4WD battery is charging while the engine is running, but once you are stopped, ...

Improved performance and affordability make portable solar chargers an attractive power option when there's no wall outlet in sight. Executive Editor David Carnoy has been a leading member of CNET's ...

Put the Solar PowerFold in the Sun for a few hours to bring a useful charge to your iPhone. Photo: Ed Hardy/Cult of Mac A solar-powered battery should be part of any disaster-preparedness kit, and the ...

David Kuchta, Ph.D. has 10 years of experience in gardening and has read widely in environmental history and the energy transition. An environmental activist since the 1970s, he is also a historian, ...

DIY solar power projects have always been fascinating to me. I kind of wrote the book on the subject. And since electric bikes have always been a huge part of my life, combining the two has always ...

This flexibility means you can keep the 1,070Wh battery topped up from household electricity for emergency preparedness, then ...

Charging EVs in parking lots with solar power is a marriage made in heaven. But the general rule for any solar or charging installation is that it be grid tied, so it can charge vehicles from the grid ...