Roost's new battery brings mobile brains to old smoke detectors

Editors' note, June 24, 2015: Roost's Kickstarter campaign from the fall of 2014 was successful, and today the company announced the start of preorders of the battery on Amazon. The product has been updated to coincide with the launch and the piece is updated to reflect the changes.

Beach Sand Used to Make a Battery That Lasts Three Tumes Longer

Sink your toes into this: Beach sand can be used to make lithium-ion batteries that last three times longer than current models, according to a study published in the journal Scientific Reports.

New Battery Could Charge Your Phone in Just 60 seconds

Designers of a new aluminum-ion battery say it could charge a smartphone in about a minute and endure far more rechargings than today's lithium-ion batteries.