Is there is a kind of battery which lasts for years before charging.

[Hossam Mounir]

Does anybody know??

[Skiiwee29]

Depends on the device and its power needs really. Generally speaking though not likely. 

[manikyath]

lasts for years doing what?

 

the thing about batteries is that for every tech there is a capacity per volume, there is a self discharge (resulting in a shelf life), and there is a current limit per capacity.

 

in theory, as long as self discharge doesnt get in your way, you can theoretically use just about any battery technology to run just about any device for any length of time, given a theoretically infinite battery volume.

[Needfuldoer]

On a shelf? Lithium primary cells and zinc-air batteries have long lives.

 

In use? Not really. The lithium batteries in emergency automatic defibrillators can sit in a pack for years and still be viable, but all they're really doing is flashing a green LED every few seconds. If you use the pack, you should replace the battery.

 

RTGs last for decades, though. Just look at the Voyager probes.

[mariushm]

It depends on how much power the device consumes.

For example you can power a clock (or keep the bios settings and time alive) witha CR2032 battery for more than a year - that one has 220mAh capacity.  You can put two alkaline D cells with 10,000 mAh each in the circuit and it will last decades.

 

In remote areas, they used RTGs to power lighthouses and beacons : https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator

They produce anything from a few watts of electricity to maybe a couple hundred for the relatively safe versions, and the half-life can be 87 years.

 

They make  "nuclear" batteries which use tritium and produce relative little radiation (safe to use, they're shielded) ... but again, we're talking about batteries that produce less than 1mA of current , enough for maybe a digital clock or a microcontroller running at a few Mhz  ... but note they have lower half life, like maybe 10-20 years.

See for example  https://citylabs.net/products/

 

[manikyath]

9 minutes ago, Needfuldoer said:

 

RTGs last for decades, though. Just look at the Voyager probes.

there's soviet RTG's scattered out and about in the russian countryside that still produce "power" (the actual electricity generation is probably rotted away, but they still make the heat as a power source)

 

their long term endurance is incredible to the point it's problematic.