Blackbeard
Enlightened
I have a lot of 10180 lights and you should definitely get more than 14 weeks of life out of the batteries. I'd order a couple of new batteries from a reputable supplier and you should see a big difference in performance.
haven't seen too many, batteryjunction has an oem but its like $4.50+shipping, not sure I want to trust another jetbeam battery, maybe I can go up in mah to another brand any recommendations would be appreciated