I’ll take “things that are wildly impractical and will never come to market” for $300 Alex!

Deeply skeptical.

A Chinese startup has unveiled a new battery that it claims can generate electricity for 50 years with the need for charging or maintenance.

So…a durable battery?

Great idea, they can charge way way more and just push an update to ruin it for us

sounds like a tiny rtg,
and according to the article it produces only about 100 microwatts (0.0001W)

for comparison, those calculators with tiny solar cells produce aparently about 0.02W - 0.35W