Ok, so i know its dependent on battery, load etc. But given its late( no time to look) , how long will the charge last on say on 2 deep cell interstate batteries at full charge( unsure of capacity, not there yet) for the ellectric toung jack to stop working? So say lowest size batteries at full charge. I want to drop my TT off to get the breaks done and bearings packed. No time to do it myself. And will need to leave it for like 4 days because of work. Or should i just put on the manual jack?