Hi, im wondering if thats the issue with mine? I have had it 5 weeks but the last couple of weeks I've been getting diabolical range, Wednesday was 100% to --- empty and I got 82 miles, Thursday was 100% to --- empty and I got 73 miles, I barely made it home. Its been into MG both of those days and they cleared over 30 pages of faults, the same the next day but they say thats nothing to be concerned with? The cells all showed up ok but one of the engineers did say it looks like the battery heater was constantly running? The senior engineer at MG head office says its to be expected because of the cold weather, im obviously being palmed off. I've left it with them and they're going to try their charger and a range check just to rule out the charger, if they don't resolve the issue im unfortunately going to have to return the car as "not fit for purpose", 70-80 mile range is totally unacceptable.