In my replacable battery items I have standardized on AAA & AA. I keep a small tin (everest gum) which just holds 4 AA & 2 AAA batteries. Several tins contain rechargable NiMh, and one tin with disposables. The disposables have a shelf life of 7 years now, but I rotate them yearly. I keep the stack of tins with rechargables handy and grab them when going on extended outings where weight is not an issue.

I also have two small chargers will charge both. One 120vac and one 12vdc. These live in the truck and have proved quite useful. Someday I plan to make a small solar attachment for the DC charger. I have tried several solar chargers and they were poor performers (years ago...are they better now??)

The tin (lined with cardboard to prevent shorting) makes a nice carry. I am lucky to have a friend that likes the gum.

These power mini-mag light, Aurora head light, GPS, Ham Radio, Palm, Infinity led light and much more. Also keep several photon lights, but I do not plan on replacing the batteries in the field.

Been doing this for years and it seems to work for me. I know I could have smaller gear with other batteries, but, I can pick up more just about anywhere in the world that I have traveled. This is a major plus for me.

Nomad