Mine is doing the same thing.
Still has original batteries in it.
Going Friday to buy two Optimas.
I have a Surefire battery charger always plugged in along with a cell phone adapter. I don't leave a battery sitting in the charger and only use the CP charger when I need it.
I might try unplugging these to see if that helps.
3 years on the factory set isn't bad.....is it?
1998 Black GMC Sierra SLT Ext. Cab 4x4 371,085 original miles. Original Engine/Trans
2006 White GMC Sierra SLT 6.6 LBZ Duramax/Allision CrewCab 4x4 141,000 miles
2005 Airstream Classic `28ft Travel Trailer