What is the most durable kind of battery?

[disappointedyoungman]

Batteries are almost everywhere from mobile computers (like laptops), to cell phones and even in cars.

 

So my question is: What is the most durable kind of battery? Is there a battery that can last for weeks without needing to be recharged?

Edited August 28, 2011 by disappointedyoungman

[Enthalpy]

If you don't draw current, yes, sure.

 

If you do, it depends on how much current, and what the battery's capacity is.

 

Laptops and cell phones use already the best among existing practical battery technology. The next to come (also lithium) has the same capacity but is safer. Others are considered (by big research team with heavy budgets) but are still unusable, like lithium-air.