AO Platinum Member
Join Date: Aug 2003
Location: London, England
Re: Does this battery need replacing ?
All batteries self-discharge when left.
After 6-months standing, 12.2V is still good.
I'd just remove it from the car and charge it properly.
It will take a whole day to charge up.
I use a 10A charger on Full and check the terminal voltage every hour.
When it hasn't risen any more for an hour, it is fully charged.
At that point, the voltage will be very high. Don't panic!!
For me, it is a lot easier to physically remove it from the car.
Others (ie those with garages) may find it easier to leave it in to charge. But with both terminals disconnected from the car.
Audi TT 3.2v6 DSG
xAlfa 156 Selespeed sp3 + Brembo conversion
Fiat Cinquecento 899cc