Roger G3XBM's (Mainly) Amateur Radio Blog

Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.

Showing posts with label donut. Show all posts

Showing posts with label donut. Show all posts

24 Mar 2026

Donut batteries - really a solid state battery with no lithium?

For weeks I have been following the 2 bit Da Vinci videos on the Donut batteries recently announced. It really looks as if this is real. I t...

16 Jan 2026

Sold state battery hype?

At the moment there is a lot of doubt about the claims of a small company revealing a solid state battery at CES that could revolutionise t...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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