I think I have a potential battery drain on my 4x4 saff as the battery keeps dying and is less than 1 year old.

I don't think I have a problem with the alternator charging the battery although it does seem to take quite a long drive to charge the battery enough from flat to start the car (around 20 min drive at a guess).

This problem seemed to start quite suddenly and I went from the battery lasting around two weeks after a long drive to 8 hours.

After this problem started, I turned everything electrical in the car on and off in case something was stuck on and it seemed to improve battery life (3 days at least). It still seems to me like the battery is not lasting as long as it should but I've not gone for a long drive and tested it.

After reading some threads on battery drains I took all of the negative connections off the battery and used a multi-meter to test each one for an amp draw while the car was turned off. I found that the big black one (serves alternator and I think starter motor) was drawing 130mA, is this high enough to cause the battery to keep going flat or do I just need to charge the battery up with a long drive?

If this is too high what would be the next step, I've read that the diodes in the alternator can go bad causing a battery drain, is there any way of testing this before shelling out for a new alternator?

I haven't had a great relationship with electricity in the past so don't want to be doing anything myself which may end up costing me more money or problems. I don't mind paying for an auto-electrician if that's what I need to do but if there's anything which isn't too challenging I can do to diagnose the problem I'd appreciate any advice anyone can give.

Cheers in advance