Wiktionary
nuclear battery
n. (context physics English) Any device that converts the energy of particles emitted from atomic nuclei into electrical energy.
Usage examples of "nuclear battery".
She wouldn't be surprised if the shuttle's nuclear battery was protected by nothing more than a single layer of lead.
Even Holly's beacon was a few shades below par, and that had a micro nuclear battery sending out the pulses.
No moving parts, lots of juice in the nuclear battery-with plenty more steel slugs in these tubes.
It's also a transmitter, powered by a small but long-life nuclear battery surgically implanted under the skin behind his right ear.