I'm currently rebuilding my medium PSK which basically lives in any pack I use in the wilderness or marine environments.

I'm switching over to CR123 for all my battery needs (i.e. Greatland laser and flashlight). I will also be storing a 5 pack of CR123's within the PSK.

Would (or could) there be any damage to the devices if they had batteries stored within them? Would it be best to have the devices battery-less then when you need them pop some in and your good to go? If I put batteries in them, then I would have 3 more (2 for the light, 1 for the laser) and that much more power usage (granted there is constent battery drain).

Ideas?