Silicon-carbon batteries have been leading phones to eyebrow-raising battery life, and the Realme P4 Power includes one of the biggest batteries we've seen in a phone. It's setting an even higher ...

I carry a set of jumper cables in every vehicle I own, and over the last decade or so, I’ve added portable jump starters to my collection of vehicle necessities. I initially selected the products ...

Testing for failure with a multimeter is only partially effective, whereas a dedicated optocoupler testing circuit provides clear results in just seconds. For related tutorials and step-by-step build ...

The Arduino is a great way for hobbyists and pros alike to experiment with programmable objects, but it can be confusing for beginners without these tools.

We’ve updated our story to make sure items are in stock and available, plus we added a new best overall, the Goal Zero 1500 power station, a new model we recently reviewed, paired with the brand’s ...

Donut Lab released a new test showing its solid-state EV battery retained 97.7% charge after 10 days, aiming to prove critics wrong who claimed it wasn’t a real battery.

Finnish startup Donut Lab has just released the third independent test of its solid-state ...

The Finnish startup’s pack can charge from 0 to 80 percent in under 5 minutes, according to its first independent test. The Finnish startup’s pack can charge from 0 to 80 percent in under 5 minutes, ...

Donut Lab says it will release independent lab tests on its production-ready solid-state batteries over the next several weeks. Skepticism abounds after the company announced at CES that it had a ...

iPhone 17 Battery Test: Real-World Results Challenge Apple’s Big Claims Your email has been sent When Apple unveiled the iPhone 17 lineup, it talked up major battery gains. But a side-by-side test ...

2025 brought big changes to the smartphone battery department, with manufacturers adding silicon-carbon batteries that massively increase capacity without increasing the size of the battery or, by ...

A broad new smartphone test has found that Apple devices lead the industry for battery life, with the iPhone 17 Pro Max ranking as the longest-lasting phone tested and Apple tied as the top overall ...