Davis Vantage Pro2 ISS Battery Life

I checked into my station at about 6:40am today to find the Number 2 station offline, needs battery, so I had a spare, thanks Santa, installed, corrected the dbase to fix the graphs and headed for Manzanillo, 86 and hazy? - but, I wanted to take pics, oh well. And, as I passed the volcano at Colima I couldn’t even see it for the haze and clouds, not what I was expecting in my stocking, thanks Santa?