oakey said:

Its the new type alternator cos last one had a crack in casing,
Dont do short journeys, normally about one trip of 30 miles each way once or twice a week and a couple of hundred each way every couple of weeks.
Never had any sign that battery was not fully charged
If there was battery drain then it would have shown earlier I would think.
The RF aerial was already disconnected and fob only worked when next to car.
Had charger on all last night and had to jump her this morning

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Datatek said:

What voltage do you have at the battery with the engine running?
Could be a bad connection is causing lack of charging.

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oakey said:

I dont know what Voltage I have but will find out tomorrow
Sorry for delay I was away for couple of days
I got a new MF31 too

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