Hand warmers are typically sold as a pair. Just the front of each UT3 Lite heats up, but the back is a magnet so you can attach the two to use as a double-sided heater.

For the first time, a complete aluminum-graphite-dual-ion battery system has been built and tested, showing that lithium-free, high-power batteries can deliver stability, fast response, and ...

Varta, a Ukrainian company, has unveiled a modular hard-kill system for engaging aerial targets at close range. Source: ...

Oct. 24, 2025 A team of researchers has designed a theoretical model for a topological quantum battery capable of long-distance energy transfer and immunity to dissipation. By exploiting topological ...