Not sure if I have a problem or not.
Vehicle: 2006 Dodge Ram 1500 SLT 5.7L Hemi/545RFE Quad Cab Short Bed 164K miles
Purchased truck new in Sept 2006. Manufacture date = 11/2005
Lately I've noticed the battery voltage seems to be higher than normal at times. Guage is normally just 1-2 needle widths past mid-point on the gauge. There are times that the needle goes slightly higher - usually at a stop, truck in "drive", headlights on, radio on, blower fan on, engine at 500 rpms. As soon as I accelerate the needle falls back to normal and stays there while at speed. Needle never goes out of the normal range is indicated on the gauge. I know these are not highly accurate.
This morning I measured the voltage with my multimeter after I arrived at work. Ambient temperature 40*F.
At idle with lights on, radio on, blower motor on - 14.4-14.5 volts
At idle no accessories or lights on - 14.4-14.5 volts
At rest (engine off - accessories off) - 13.7 volts
Battery is 6+ years old (Original OEM battery) .
I'm thinking it may be time for a new battery. About 6 months ago I had Advance check the battery (didn't have multimeter at the time). As I recall everything checked out okay at time - measure 798 CCA (battery is rated 750 CCA), voltage was fine - I don't recall the voltage measured - around 13 volts at rest.
Thoughts appreciated.