Basically, VTT hooked up Donut Lab’s to a battery tester and left it idle for 10 days, while measuring the voltage every 10 seconds. According to the results, the cell demonstrated high stability, ...

Finnish startup Donut Lab's third test shows its solid-state battery retains charge for 10 days, proving it isn't a supercapacitor.

Donut Lab released the third independent test of its controversial solid-state battery, this time trying to prove it's not a ...

Donut Lab's third independent VTT test confirms its solid-state battery retains 97.7% capacity after 240 hours idle. Energy density and cycle life remain untested.

Scrolling and streaming suck plenty of power on today's Android phones. Here's how to squeeze the most juice out of your battery, including a new option to monitor battery-hungry apps.

Choosing the right RV battery setup can make or break your time on the road. Whether you’re boondocking in the desert or topping off your devices at a full-hookup campground, your power source needs ...

Rechargeable batteries are everywhere—from portable electronic devices and electric vehicles to renewable energy storage.

A water battery with tofu-like salts can withstand 120,000 charges and could last for centuries without degrading.

Did the Bluetti Pioneer Na keep working in the freezing cold when most batteries would give up? I tested it to find out.

URC 2026 System Acceptance Review (SAR) White House stalls release of approved US science budgets. The US Congress rejected sweeping cuts to science agencies. But the NIH, the NSF and NASA have had ...

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, ...

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 ...