A while back I tried 'quick' lunchboxes but they leaked in tropical deluge conditions (simulated for testing, real for my CHDK camera project).
Hmmm ........... sounds like a very difficult situation.
Did the rain come through the back, gasketed lid or the hole in the front ?
You can extend battery life if you are able to turn the camera on-and-off each day.
I am told that a crystal-controlled microcontroller is sufficiently accurate without using a realtime clock.
Of course, you or someone else has to build and programme it.
You also need to permanently depress the power button.
I also thought (for the same reasons) 12v would be better than 6v.
It unecessarily increase the physical size of the battery.
What external voltage does your camera require ?
The switching regulators are typically 90% efficient.
I'm assuming it's 6 days safe run time i.e. until need-to-recharge battery state, not draining the SLA battery to the point of damaging it.
I cannot remember the final discharge voltage but it was less than what is recommended.
For calculations, I think you assume only 70% of amp-hours are available.
David
