Everyone whose Merlins...

100 plus hours of use for ac ops and at least a half dozen full battery discharges and charge up cycles will do the trick. to do this unplug the unit and switch to battery and the batteries will drain overnight with no music playing. the chip set draws a few volts at idle. then charge them up for 24 hours by playing music and drain again, etc.
bobby at merlin

Bobby,

In my rig, the sound continued to improve with 15 or 20 discharges/recharges. Just gets better and better : ))