Ordered new Goodyear Endurance & New GC battery install

We just got back from our 9 day stay at our property. The weather was great most days but the nights got a little chilly. We had lows of about 15 to 20 degrees so the furnace got a work-out.
The new golf cart batteries held up really well and every morning they only lost about .2 volts according to my cheapy voltage meter. My old marine starting/utility battery would be very low every morning.
I should have done the change when we bought the TT but we got by, just had to run the generator more.