I have a Yaesu VX-7R, and I'd have to pick another radio for emergency use. I used to have a Yaesu FT-530, for which I could get a 12v 1200maH NiMH battery, which would last all weekend and retain a charge for a good long time. The VX-7R has only a 7v 1200maH lithium ion battery which lasts about 5 hrs max.

The VX-7R is rugged enough and waterproof, but that battery issue is a killer for me.