Like Chad I have a 201 and get about the same time for the battery.

Now having said that, this is not the GPS to buy for use in tree cover. In subalpine/alpine/desert/tundra it is great. But in trees it skips.

As well, take the time to get all the satellites and "3-D GPS" before heading out. If you have that before you get going it seems to drop less often.

For dayhiking/overnights I use mine often (2 years now). It has what I need - to tell me where I am, when the sun goes up and down and how fast I am going, miles, etc. and nothing more