That response from Batteriser just makes me want to go and get one of these GPS's and repeat the test myself...
Funny thing really, I was in at a cash thieves shop down here last week and they had a brand new Garmin G3 Golf in the box for eighty bucks, I pulled it out and had a look and was so impressed that when I got home the first thing I did was searched for video reviews all of which by the way indicated around fifteen hours of use.
Anyway I was tenpted but walked out with an AEG 1300 watt sabre saw instead, handy for cutting sandwiches you know, I can go back or ring them to see if it's still there but this whole thing is almost over and I think that Sky did more than enough already, your call.
They are only handy if you play golf as the course layouts are down loaded into the unit and they can also tally up your shot count, I wanted to ask Sky if they save the shot count after the batteries die as that might be awkward in a serious match, anyway no good for general GPS usage just for ball whackers.