This keyboard has the longest battery life, thanks to its solar panel.

A year's worth of our rigorous lab-testing scores plus your top brand recommendations come together to create our definitive ranking of the 25 best technology companies right now.

Switch to solar with a system built for you. Solar panels can lower your electricity bill by 75% or more, but the upfront investment is significant. Most homeowners spend between $12,600 and $33,376 ...