DARPA looking for battery that could power a laptop for months
https://www.theregister.com/2026/04/08/darpa_fusion_firm_radioactive_battery/
Fusion energy is taking a surprising turn: a Washington state startup is developing high-power, radioactive batteries that could run energy-hungry devices for months or years from a single, compact unit. Aimed at DARPA’s needs for space and other demanding environments, these batteries could replace daily recharges or disposable AAs, delivering long-lasting power in tough conditions. The catch is radioactivity, but for certain missions the payoff could be huge.