Morning Star wrote:
I'm surprised that no-one has mentioned a spare battery....
My camera battery charger and the spare battery both live in my camera bag.
I hadn't used my camera for probably 4 or 5 weeks, and when I put it away the battery in the camera had already been well used. After a day or so of shooting, it was drained. Replaced it with the spare, and happily carried on, even after that spare had been in my camera bag for so many weeks.
The OP said he carries several additional camera batteries. The problem is charging them upon depletion.