The cheapest way to pre-order the ReVolt is with a pledge of around $35 which gets you the USB power cable, a single AAA adapter battery, a single AAA dummy battery, and the extra housings to make ...

A new emissions-free device created by scientists at Stanford University uses an ordinary 1.5-volt battery to split water into hydrogen and oxygen at room temperature, potentially providing a low ...

CR's experts pick the best portable solar panels and battery chargers to power devices like phones and laptops, plus back-up batteries and power stations. Ad-free. Influence-free.

If you’re trying to find ways to move away from single-use items for the sake of the planet, don’t overlook the humble AA (or AAA, or C, or D) battery. Rechargeable batteries can cost more ...

Single-Cell AA/AAA, 555-Like Analog Timer with Battery-Safe Operation Dec. 21, 2010 Semtech Corp announced a sub-1 V analog timer platform that revolutionizes the conventional 555 timer for low ...