Out-of-interest, how are people keeping their i3 12 volt battery in a good state of health during these prolonged lockdowns?
What is the mileage on your i3 please? And is it used mainly for long or short journeys?I am having my 12v battery replaced next week when I have my MOT.
The car is coming up to four years old in March, that seems to be from what I have read when the battery should be changed.
I keep getting a message about the battery losing charge when the car is not used, it's happening about every three days, too often for my liking.
When I bought my car 2 years ago, I asked for the BMW diagnostics on the batteries. I got a printout saying the 12V battery 'performance' was at 98% and was fitted at 0 km. This means my battery is now 6 years old - still seems OK .......The car is coming up to four years old in March, that seems to be from what I have read when the battery should be changed.
When it’s not being used (in the garage?) do you keep it plugged in to the charger whether it be granny or 7kw?My problem is I do very low mileage about 2000 a year, some times it could be in the garage for a week and not driven, even more so at the moment because of the virus.
I need a car because of my disability, it gives me freedom and independence to get out and do my shopping and not depend on others.
But it’s not holding the traction battery at 100%.....no EV manufacturer in their right mind let’s the TB reach 100%, same as they don’t let them reach 0%......Holding the main HV battery at 100% for long periods seems like a much bigger downside than having to deal with replacing a £100 12v battery every 4 or 5 years, I have to say!
There's no reason why the 12v will be preserved any longer just because the car is plugged into the mains - as noted above the 12v only gets charged if the HV battery is charging, or if the 12v is already catastrophically low, by which point it's already degraded.
I think there's no good answer for this, car manufacturers will simply need to tackle this properly. Leaving the car plugged in to the mains isn't the answer.
I agree; however, it has been suggested to me that the simple act of turning the car on (or just opening a door) is enough to start the DC to DC converter which supposedly continues to run for about 30 minutes after the car is locked. I confess that yesterday I decided to charge the tyres using an electric compressor. There are some reports that when doing this the DC discharge rate will exceed the charging rate so I confess that I powered up the car (making sure it was in park and handbrake on) and climbed out of the passenger door before using the compressor.I am sure you know better, but I will continue to follow the official guidelines.....