If you don't use baby wipes regularly, I would check them. Unscented ones can go rancid and stink. Believe me, we have two kids in diapers and purchased a million baby wipes and relatively quickly (several months) they smelled foul. I am sure that scented ones would not smell bad like the unscented ones, but I would recommend rotating them if you have not.

Sounds like it weighs alot.

I would try to standardize the battery. C's, AA's and AAA's may be alot to keep track of, and depending on the situation, one electronic device might get more use than others, so in a bind, they could just be taken out on one device.

Those are my initial thoughts, butt it looks vvery good and practical...