I would recommend that you power the unit off the external power port. When I ran that unit, I found that two cells read 30 mv and 10 mv off. This caused the Balance circuit to " unbalance" the cells. Using a 12 volt buck converter then powering it this way reduced the balance mismatch.
I would recommend that you power the unit off the external power port. When I ran that unit, I found that two cells read 30 mv and 10 mv off. This caused the Balance circuit to " unbalance" the cells. Using a 12 volt buck converter then powering it this way reduced the balance mismatch.