About a month ago I started suspecting my SUV battery was getting weak. You see, the SUV has a battery protection system that detects if the voltage is getting low (with the engine off, parked). Prior to a month ago I could shut down the engine in the SUV and my dash cams and RD would stay powered up for maybe an hour before the battery protection system would shut things down. Over the last month, when I shut off the engine all the accessories go off immediately. I put the charger on about 2 weeks ago and right off the bat it shows very low charge left in the battery. Next day the charger is showing pretty much fully charged but when I shut off the engine after driving all the accessories go off right away. Interestingly, several days ago I put the charger on again and again it shows a very low state of charge. I left the charger on for 2 days (trickle charge) and at the end nothing had changed, still low but more interesting is, I put the charger on another fully charged battery in the garage and it shows full charge. Really interesting is the service department at the dealership checked the battery and charging system and everything came back 100% (no charge, warranty). I then took the vehicle to a independent battery shop I know well and they also say it is decent shape and load checked well! So, on a fully charged battery in storage the charger shows it is fully charged yet on the battery in my SUV it shows very low charge and 2 other sources also say fully charged. Any ideas?