hi guys/gals, got in my car yesterday only to find the battery light is lit up on my dash in red. Car started no problem at all, now I have to reverse off my driveway which was fine then a message came up on dash gearbox error and could not select a forward gear. I turned engine off but the would not restart as stuck in reverse gear even though I put it in park before switching off. tested battery with altimeter only to find the battery was at 9.4 v. grabbed the wife car and gave it a jump start and got it back onto my driveway. I removed the battery gave it a trickle charge over night and is now full 12.79v after resting for a few hour. put said battery back in the car started up no problem and drove about 20 mile with no problems at all apart from the battery light on the dash is still on. tested again with altmeter with engine running this time and it seems as though it is not receiving a charge as it's only at 11.4v.
drop test done on battery and is fine so I know it isn't that, car booked in garage Friday hopefully not too expensive of a fix.
has been fine the last 6 month nothing came up on the dash at all then bang battery warning light.