The battery in my SkyFi 3 seems to run out quickly, well short of 10 hours operating time, and also seems to lose charge when stored. I just upgraded to SkyFi 3 in March. I loaded firmware 1.3.4 then to ensure I had the latest. What I noticed is that it seems if I let the SkyFi sit (in the house) for say 2 weeks, I won't even get 15 minutes of run time out of it at the scope.
Most recently I used it the evening of Oct 17. Charged it to 100% that night. I went out on Oct 20 and only got 4.5 hours of use before the power ran out. I charged it overnight and checked this morning and the battery is charging to 100%. Just to be sure moving forward, I just reloaded firmware 1.3.4 to see if that helps.
Doesn't that battery life seem quite low? Temperatures during use were above 50ºF and as I said, I store it indoors.