This morning I came out to a dead battery for the second time in two months. I’ve never had this problem with any other car I’ve owned (I’ve only owned the Volvo for 5 months). I checked for the obvious things that may have caused the battery to drain (lights left on, etc), but couldn’t find anything. This happened last month as well, with no obvious reason for the dead battery. Last night I locked up the car using the lock button before closing the car door, while usually I use the remote to lock it (for whatever this information is worth).

Assuming it’s not me causing this problem, (of course, it’s usually operator error) does anyone have any idea what could be causing it? Recommendations?

Thanks
Ian

How old is the battery? The OEM Volvo batteries last about
3 to 4 years. Yours could be on it's 2nd battery and may need
a third (98s were sold starting in April 97 so some are about
8 years old now -- mine is).

I'd also check the lights over the rear doors if you have kids
(mine click them on all the time and you don't notice since the
car slowly dims the lights and you have to come back after a few
minutes to check them.) They do get left on over night on occassion
but have never actually run down the battery.

The rear trunk light is another one to check. Just leave
the rear seats folded forward when you lock the car up to
check that one.

My rear door latch drained a battery completely dead overnight. Dome lights were not on - the latch needs replacing (acting fine for right now though)

Best bet. Glove box switch.