Is it normal for your batteries to have a smell? I have a D2700 and 2 XP3000's in my rear bank and when I open the hatch it smells funny. Like a sweet smell. They have done this last year in my car also. The car only charged at 13.8v. They also make faint chirping/gurgling sounds when they are being charged. Did it in the car also.
Just curious. They do not get warm at all. Charging in the 14's in the truck.
The D3400 under the hood does none of that. Weird.