I bought a Exide Heavy Duty for the Derv, lasted 3 weeks.

Place checked it all and gave me a new one, so even new batteries can be duff!!

Got a belter Bosch S5 on offer a couple years back off ECP. Not a faulter!
Can recommend.

Sorry, I wasn't very clear in my last post. I fully charged up a new battery I had for the 120 but that barely had enough power to lower the window! Admittadly the CCA rating and amps were lower than the one on the car but just wanted to try.
So I went to get a new battery, same CCA and Amps as the one on the car but nothing, not even trying to turn over. Could be a dud or a connection problem. So I'm charging the one that came with the car, it was flat but has fully charged now.
Frustrating as I had another bump in my MG3 this morning and blew two tyres after a cyclist pulled out in front of me. I also had a minor collision on Friday in the 3, not a good week! Will let you all know the results on Saturday when I have time to get it sorted.

I would be checking the earth straps and starter connectors before I do anything else just to cross it off the list.

If you're having problems with windows it is probably the earth point on the slam panel or the earth clamp on the battery.

I kept on blaming my batteries, bought two new ones as they drained and had to jump start the derv after a couple of weeks just sitting.

The starter motor started playing up, corroded + battery lead to starter motor, new connector and it was OK for a bit then started playing up again.

New starter motor and the car has never started so quick, spins the engine up like a mad thing. Not touched the battery and only done a few trips, but its OK.

So dont always assume its a shot battery.

Second a "rule out other things" but I've had a duff battery too from a motorfactors.

Ended up buying a bosche one from ECP for less, and the car still ate it..... had both a duff starter & alternator...

Not been able to do any checks on the car today but will call out the breakdown tomorrow as I have homestart. Should give me an idea.

All fixed, many thanks to Jay for all his help and everyone else who has chipped in on the forum. Just cleaned and tightend all the connections, they had gone a bit green! Now for a first proper drive

You back yet? :laugh: