Join Date: Feb 2007
Location: New Jersey
Thanked 63 Times in 62 Posts
Rep Power: 9
I have, at times, switched from bat 1 to bat 2 through the both setting with no ill effects, that I'm aware of. I just replaced my bank ( 2 batteries) after almost 5 years of reliable service.
Question. Are both your batteries of the same age and type?