sunchaser,
I discovered I can reset my mileage by pressing in both buttons on the display and holding them in for a few seconds...
I always charge my batteries to 100% after use, and leave the unit plugged in for 24-48 hours to balance the battery cells. My imbalance is reporting around 80 - 88 mv. I "heard" 100 mv imbalance is not a good thing...
After several (8 to 10) charges / dis-charges, the imbalance has not changed...