Looking at the Garmin website, I got the impression that the 301 uses proprietary batteries, which would seem to indicate access to a power source is necessary to recharge them. Is this correct? For me the supreme virtue of the 101 is the use of AAA batteries, the standard for my outdoor electronics gear.

I was using my 101 intensively a couple of weeks ago, getting good data mostly, but it hiccuped twice, giving clearly oddball readings. Both times I was in the bottom of a steep walled canyon with fairly heavy tree cover.