AO Platinum Member
Join Date: Aug 2003
Location: London, England
Re: 147 Battery...
Could be an alternator problem.
Was the new battery the right spec?
What was the battery voltage of your old battery after you charged it?
What is the voltage of your new battery now and also when the engine is running?
A fully charged battery will show 12.7V or more (once down to 12.2 it is flat). With the engine running you should see around 14v.
Modern batteries can take a long time to fully charge.
When charging you need a charging current of around 10% of the A/H rating of the battery.
Monitor the terminal voltage every hour.
Stop charging when the voltage has stopped rising for an hour.
I needed to recharge mine this week, it took 14hours to charge from flat
Audi TT 3.2v6 DSG
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