When working around mains voltages, it can be useful to know whether a given circuit is live or not. While this can be done by direct connection with a multimeter, non-contact methods are available ...

In early 2014, the infotainment program Inside Edition aired a segment about the dangers purportedly posed by 9-volt batteries, focusing on a house fire reportedly touched off when improperly ...

A reader saw our Nine Volt Candle post and took it upon himself to make one of his own, then share the steps with the world. In short (because we’re not that handy and like our gadgets pre-assembled), ...

Combine the 9V battery from your kid’s RC racer and a LED-based candle and you get something that feels at home in a fancy restaurant as well as on your dining room table. Just a design for now, but ...

Use every drop of energy from a 9-volt battery by adding it to an LED Blocklite. I was always stumped about what to do with partially depleted, 9-volt smoke detector batteries. They’re usually drained ...

Smartphones are more powerful than ever, but they still have an annoying tendency to run out of juice just when you need them most. The Kickstarter-backed Plan V could get you out of such a fix, as it ...

While it’s the easiest way to lay out a simple circuit for prototyping, breadboards are a pain. They are the ultimate kludge; they work well enough, but no one will ever say that a solderless ...

Drumroll please……. We are happy to announce that after much anticipation on the part of Inhabitat readers, Richart Lawson’s in-demand 9Volt Battery LED Lamp has ...

Mount Olive fire marshals have issued safety warnings about the storage of an item most of us have lying around the house — batteries. Two 9-volt batteries were the cause of a small fire in a township ...