Hey guys I have a duo. The first one. And I have a few questions. I want to know why it takes me sometimes over 90 mins to charge batteries. 3800-4800 mah Also I had a 3cell 1500mah batt charge for 99mins Is this normal?? Or is something wrong???

Also Can I update this? or do I need to update it?

I use a 13.8v 12.5amp PSU

Also I have a basically new smc battery I run it, then let sit for 5 mins. then go to charge and the charger is telln me the battery is done chargeing. can you tell me why it does that?

Thank you much appreciated. Love this Charger.

This is my first time with bad cells and could use some advise.
I was getting ready to charge the 4s and the charger gave me an error message saying I was trying to charge it with to much voltage. I checked the balance and it shows c1 2.6 c2 3.84 c3 3.85 c4 0.0
Can I do anything to bring c1 and c4 back to life, or is it a done deal?
thanks