China's Sooall gives exercise an eco edge, letting you charge some batteries while you pedal away your excess fat.
It's always good to have extra battery power in your pocket. Get some with this week's prize, a portable pack from Ventev that can charge two devices at once.
The Roost Smart Battery packages Wi-Fi connectivity into a 9V package. Put it into your old smoke detector, and you'll know if it sounds no matter where you are.
Commentary: Today's smartphones are incredibly sleek, well-designed electronic devices except for two glaring issues. Maybe someday that will change.
This slightly updated Air may run longer, but it's no longer on the cutting edge of design.
The Powerwall for homes and Powerpack for businesses can store energy from solar panels and help you save on energy bills.
The battery life on the Apple Watch will last you about a day. Here's you can squeeze some extra juice out of it.
CNET's Dan Graziano shows you how to squeeze some extra juice out of your new smartwatch.
The Powerwall battery back-up system, introduced by Tesla Motors, can store electricity generated by solar panels or taken from the grid during off-peak hours, then power appliances and devices in a home.
The Powerwall home battery aims to revolutionize energy consumption, Messenger ends its Mercury mission with a bang, and Microsoft's age-detecting tool is not to be trusted.