Hello, I build two MB-6582, working perfectly. I have used psu option B and build my own psu with 5VDC und 9V AC (Tranformer 2x9V und 7805 with 3A max. ) Under full charge the 5V DC drops down to under 3V. I have tested this with 3 different power supply units (regulated power supplys) For both MB-6582 I need a no-load voltage of 8V. I am pretty sure there are no short-cuts etc. I did some current measurement and there are no uncommon currents. Any suggestions? Maybe because of the 22