How long do ego batteries last?

[BelleSF]

I have two ego batteries and one died after two months. The other one is still alive. What is the typical lifespan of an ego battery?

 

[Switched]

It depends what is used on them and the quality of the batteries. joyetech has a good lifespan from 6 months to well over a year. Other "eGo" batts, its a pig and a poke.

 

[BelleSF]

Thank you!