To be fair I got 180h. So I should have expected it. They're 175h run time right?
I'm just irritated it didn't give me any notice. I checked it the day before and it said it had good battery life. So I didn't bother changing it. As thought i still had good life left!
How many hours of use did you get out of it?
(these are what you need btw)
http://www.amazon.co.uk/Renata-Lithium-Battery-CR2450N-SWISS/dp/B001BO7L10