Thanks for all the input guys, keep it coming.
Mk, how old was the battery? Lithiums usually have a pretty long shelf life. I'd like to get a Petrel too, besides being an awesome dive comp, I really like the battery flexibility.
I owned the battery less than a year. The Saft LS14500 batteries can be a little tough to come by. I bought it from a brick and mortar battery store. I have over 100 hours on the current battery. My current back up battery just turned over a year old.
I've had good luck with the Energizer lithium disposable batteries in the Petrel. They seem to last ~75 hours. I typically dive in temperate to warm water, 68-96F.
My cave instructor Edd may have converted me over to Duracell Quantum batteries. http://m.youtube.com/watch?v=SJcvwPTOLSI&feature=share
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