The friend backpacker

Datalogger shock that followed me in a few treks :) It is very sensitive (unlike my first Sony GPS) and thus will not lose the position in a canyon (or in the middle of skyscrapers ...). Using a 2500mA AA battery provides 1.5 to 2 days, which is more than enough.

I embarked on a trek of 3 weeks (with a solar panel to recharge the battery), and I had to use roughly half the memory because a position every 30 seconds and 8 hours a day. And how nice to see the entire route on google earth back!