We have a 2001 Subaru Legacy GTB wagon that doesn't get used a lot anymore, since I got a new work car and wife got a cheaper car to run around in.
Due to it not being used often, plus having an alarm, the battery would go flat often so needed a jump start.
Eventually it got the point where the battery light came on and didn't got out so I thought the battery was needing to be replaced.
A few weeks ago I tried jump starting it again, and it would start and run OK but not long after disconnecting the other car the Subaru would stall. Tried jump start again and same thing, could not keep the Subaru running.
I assumed the battery was finally gone so got another one and installed it.
Car starts fine now, and runs great, but the battery light still stays on.
Just tested tonight with a multimetre, and with the car running there is about 14.2V across the battery, even with some electrics going and lights on high beam so I suspect that the alternator is OK too.
So what else could be causing the battery light to stay on?