Last time I sent my BK9920 in for repair, they charged me $100 for it
. Took like a month to get it there and back too. Might as well buy a new Mamba Max, lest you need something for lots of cells. It fried again on me, so I'm just keeping it now. Not worth $100 for the repair again.
If you do get it repaired, let us know how much it cost. I'm curious to see if they've changed the price.
Brijar!!!