I have 6 - SK12V206H that I purchased in the last month. All the batteries showed up with 0% SOC on the BMS app, so I charged 5 up to 100% SOC, BMS cutoff, C-MOS to off. The 6th battery only went to 85% and then quit charging, no current flow, and 14.63 for voltage, maybe it was balancing? I could not tell. So I disconnected the battery and let it rest, yet 48 HOURS LATER, THE VOLTAGE IS STILL 14.12 volts! The other 5 batteries dropped down to 13.7 volts or so in a lot shorter time... Could I have a problem cell? Should I try and charge again to 100%? Should I discharge instead? Is there anybody else that has seen this? Maybe it isnt a problem at all, but this battery has not acted the same as the other 5, not sure what is different but I really do NOT want to screw up the batteries, they are NOT inexpensive as 2e all know... Any ideas are appreciated, trying to contact tech help too thanks