US regulators recall refurbished Galaxy Note 4 batteries
Some of them are counterfeit and at risk of overheating.
Researchers create more efficient supercapacitor to power wearables
The material gets around all of the issues that limit supercapacitor use.
EPA docs reveal how Tesla's long-range Model 3 covers 310 miles
The electric vehicle has an 80.5 kWh battery and a 258-horsepower motor.
Tesla battery head departs as Model 3 production ramps up
He's leaving at a pivotal moment for the electric car maker.
Nintendo has a fix for the Switch's battery bug
If updating to the latest software doesn't work, get ready to run a weird series of instructions.
Engadget giveaway: Win a River Mobile Power Station courtesy of EcoFlow!
Untether your electronic life with this powerful smart charger.
Alphabet is using salt and antifreeze to store power from wind farms
It'll help prevent wasted renewable energy.
Nanomaterial charges everyday batteries in seconds
You don't need to ditch chemical cells to get near-instant power.