
Originally Posted by
benandtina
......
My only complaints would be:
1. The internal battery means when the battery drains we're done caching. We could not finish the Sears Island caches because our battery drained when we were at the halfway mark........
I've been spoiled w/the self-contained rechargeable aspect of my Garmin 530 hcx. I can run it for a consistent 24hrs. of caching on one charge. On the other hand...my PN-40 is rechargeable and Eats Charges!!!! So you have to plug it in while in transit to the next cache.
I have a Nuvi 765T that I like for navigating to caches. Its mount contains the power cord, so it's easy to mount/dismount quickly, and charge while driving between caches. This is also helpful because you should Never leave a GPS in direct sunlight!!!!! It's not good for the screen and prematurely kills the life of the internal battery. Also doesn't hurt to get it out of sight of all the sticky fingers out there. 
I used to own a Colorado and Hated switching out batteries all the time. So I bought a small sling bag and small automobile battery boost pack that has an accessory jack. That allowed me to cache all day w/out connecting/disconnecting any cords. You could do the same to power a Nuvi.
I'm just nuts about geocaching!!