In a power outage, a 9 volt battery can give your phone enough ... but it’s a theory my husband had when we tested this hack on his Moto X Pure and a charger capable of Qualcomm 2 fast-charging.

It's a good thing software code doesn't weigh much. The Chevrolet Volt boasts an all electric range of more than 40 miles, but it takes 10 million lines of code to get it there. The software heavy ...

Both watts (W) and volt-amperes (VA) are units of measurement ... a 100-W light bulb left on for 10 hours consumes 1 kW-hour of energy (100 W x 10 hours = 1000 W-hours = 1 kW-hour).

Now, Elon Musk has released another previously unknown detail about the new Model S and Model X: Tesla is moving to Li-ion 12-volt battery. Like in most cars, the 12-volt battery system in Tesla ...