On a sunny day (Thu, 10 Apr 2014 18:35:53 -0400) it happened
wrote in :

But limited number of charge discharge cycles lipos have,
John is right about that (350 times perhaps).

*Easily* 500 cycles and more like 1000. Because the self-discharge is
so small, that's generally a long time.

See my reply to Jonhn, about the Varta datasheet
Or google Varta LP523450DL lithium ion.