It's a 1-amp trickle charger/maintainer. A Noco Genius 1, to be exact. It's not supposed to overcharge, no mater how long it's left. I suppose it could be going bad, but I've had the battery go flat twice before after sitting for a week or two, which isn't normal.
I posted about the battery going dead awhile back, and the glove box light was mentioned, but I checked that and it was fine. That was before I noticed the sides bulging a bit.
I do wonder if the Volvo charging voltage being low could be to blame. I'm used to vehicles charging at 14.x volts, and the 850 is only 13.x although that number does seem to be commonly reported here on the forum. Maybe I just got a bum battery?
I haven't made it out to get a new battery yet, been working on other things. I had to travel a bit to pickup some carpet tiles that I intend to line toolbox drawers with.






