I've noticed that every time I've been out with the car over the last couple weeks that the power/torque has faded a lot after being out for 10-15 minutes of running. At first I thought I was getting close to the lvc but when I put it on the charger, there was still lots of juice.
The battery is a 2s 5000mah.
It has been -25'C to -40'C over the last number of weeks.