[whatabouteve]

We had our 12v batteries running 201 and 245's robots in a parade 2 weeks ago (Michigan suburbs north of detroit). It was freezing out and they had been sitting out all morning so they were at 32 F. The batteries tested at above 12v before packing (the warm school). While in the parade, they were slightly less but the robots ran the whole 30 minutes on 3 batteries.

The robots were sluggish, but nobody is going to question you changing the batteries before you start. I mean you need to take 5 min to turn it on anyway right?

I would not worry about 50 F weather. Its not their prime but it is alot closer the the optimal performance zone.