0610i Net/DUO Ques

I'm using mine 0610i for 1st time after v1.6 firmware upgrade and read the manual addendum that came with 1.6. Hyp makes point that connecting batt in right sequence is important to safeguard something internal to these chargers - ie main pack +/- wires (A) then connect balance conn (B), then reverse B-A to disconnect.

I saw a decent spark when I connected the main pack wires. I had the charger turned off - I usually connect everything, then turn charger on and select routine or setup new one. I usually discon batt while charger is still on though.

The addendum never says one way or the other. Do you turn the charger on and then make A-B connections, OR leave charger off, do A-B then turn it on??

You think it makes any diff??