Driving for extended periods with high voltage going to the conventional wet cell (flooded) battery or a sealed AGM (absorbed glass mat like Optima) or gel cell type will cause problems regardless of type. The wet battery will boil over and cause acid damage but not necessarily kill the battery as they are more forgiving. If you do the same with a sealed battery, you will dry it out and it will become scrap. Chrysler put ammeters on our instrument panels for a reason, you need to keep an eye on it. If the gauge indicates excessive charging, look into why that is happening. If the car has sat for an extended period, and the battery is low, high output is expected. If, however, after adequate time has passed once the engine is running, and the ammeter is still reading high, your voltage regulator is probably not maintaining the desired voltage, which is about 13.5 to 14.8 volts. If you go above that, you will have problems. Running the headlights won't fix the problem but it may slow down the damage to the battery because some of the current will be flowing through the lights and not the battery. The higher the amperage output of the alternator, the less running the lights will help. Best bet is to get the voltage regulator replaced. Check the charging voltage at the battery with a digital volt meter and that will tell the story. Look for 13.5 to 14.8, no more, no less. Too low, and the battery won't get charged, too high, and you will dry it out. Bob J <http://geo.yahoo.com/serv?s=97359714/grpId=3732744/grpspId=1706713852/msgId =19854/stime=1188149969/nc1=4767086/nc2=4507179/nc3=4834084> [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/