Hi, recently my S80 car always run of battery, then I have to use battery tender to charge the battery, i wonder if it is wrong place from light switch panel? anybody know where i should put light switch, is it in "O" which is all lights off , or should be on headlights position. my car is 2004, anybody has suggestion? thanks.

 

Either is fine - the lights turn off completely with the key with the headlamp switch in the on position. So that's not why your battery is going weak.

 

Thanks for information, in this case, i think it's battery quality issue, the battery was replaced two years ago, actually this is first time I replaced battery, the original battery run 13 years.