I have heard that Volvos are notorious for overcharging their batteries. In my case, our '94 850 turbo wagon has just gone through two batteries and blew out the highbeams and other bulbs in the span of one week. After checking the charging output at the battery itself, it registered 22V! Is it just a simple matter of replacing the alternater/voltage regulator, or does the problem go deeper than that? Unfortunately, I could not find any forum-messages relating to this problem. My hope is that I have not done any permanent damage to other electrical components as I had to run the car two hours with the battery disconnected to get it back to civilization. My first attempt will be to replace the regulator, battery and blown lamps. Any advice regarding this would be appreciated.