I found a product that might be of interest to other family’s and friends of firefighters. I am not sure how to let them know abut it, or if it is even appropriate for this type of forum.
It is a portable Cell phone charger. It is viewable at www.sidewindercharger.com.
It only weights a few ounces, and is about the size of a half deck of cards. I have tried it with my cell phone and it works great!