Like Polak187, I try to keep my batteries to CR123s and AAs. I find that things like GPS, Radios, back-up cell phone chargers, maglights, ect usually can be found in AA and high powered flashlights in CR123's. I bet if need be you might even be able to start a vehicle off of those CR123's. <img src="images/graemlins/smirk.gif" alt="" />