Dream, At this level of cost, fussiness, and audiophilia, the mere fact that the battery may last only 3 years should be the least of your concerns. How much could it cost to replace the battery, as against the cost of this or the other turntable, not to mention the cost of the tonearm and cartridge that go with either? IMO, a really well designed power supply that produces the DC voltage necessary to run the motor, which is presumably a DC type, gives away nothing to a battery source, in terms of "black background". Three motors in concert are going to put more "noise" into the platter than any good PS would. Of course, the operative word is "good".