Right now using an Explorist 210 and a Palm T|X with CacheMate. Since I started using the Palm I've gone from 2 to 3 caches in 4 hours to 5 or 6 in two hors. Can;t beat CacheMAte and searching for nearest locations. I haven't run into battery life issues with the T|X, just charge it at night if you need to but the charge lasts more than a few days even using bluetooth and my cell (Nokia).