Idk anything about nuclear power. But this sounds almost too good to be true. No downside whatsoever?

Still safer then lithium batteries

Very interesting, especially from the decay side.

I don‘t buy it, but I would buy it.

Well that quickly became an interesting rabbit hole ..

Hackaday

Make Your Own Nuclear Battery

A Betavoltaic cell is a device that uses a radioactive source of beta particles and a semiconductor p-n junction to generate electricity. Tritium, ...

It seems like I've heard this story a lot, some startup made an actually working nuclear battery that is actually doable. But even assuming that this is correct the company really did everything they claim it's certainly not going to power a phone. The Iphone 15 can output 12.981Wh meaning that if the battery really did output 100mWh you would need 129.8 of those batteries to replace an Iphone battery. There's plenty of room for technology to improve but it's not exactly like nuclear reactions are a new concept so I am not sure if this would be able to improve like an entirely new technology could. Maybe someday we can have something more powerful but I wouldn't get my hopes up for 2025 like they claim.

Until an actual product arrives, I will never believe battery news anymore.

i'm sure the military already has them in their most expensive projects, but probably currently a huge cost in production, and probably the weight to momentary power ratio is probably still in the range of NiCd grade of power density, if not less

There is no such thing as waste! Only people wasting a potential resource. (Usually because someone in government decided to strike a pose, using other peoples money and no skin in the game). This is a great use for radionuclides usually wasted.

Might be, but I don't plan on signing up for the army to get better batteries...

my point was that there is probably advanced military tech using larger scale versions of these things, for satellites and high altitude drones, for example if they can get the power to weight ratio up high enough and have them put out more power for less time it's gonna be a boon for autonomous spy recon drones too

Deep space probes also use nuclear batteries, this is not new, just smaller.

And 1960s/1970s heart pacemakers!

The case of the Pu-powered pacemaker

Most journalists would believe a person would die of cancer after being in the same city as such a device :-p

The resulting chemical waste just might, and it has a half life of "forever". But as long as we can outsource that work to the Third World using borrowed fiat money, we'll be fine...

True enough, but the iPhones gluttonous 12W consumption is a challenge, not a dealbreaker. With modern semiconductors, it would be totally possible to run the equivalent of a Nokia 3210 on 100mW. Remote area work. Emergency services. Emergency equipment on marine vessels. There's a big market if they can get the government out of the way.