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

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?

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

Deeply skeptical.

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