The earbuds also come with a carrying case that can also charge them up for people on the go. (soundguys.com)
In the future, our cars may all run on battery power, and perhaps we'll charge them up with electricity generated from renewable sources of energy. (theglobeandmail.com)
If you don't charge them up regularly, they're just hybrids that cost and weigh more. (autofocus.ca)