Negative Positive
Title: Mixer
Review: This one works great on the battery, but the power supply you sent in another order does not work with this unit. I think it may be the wrong polarity. I will check it when I get home to be sure. You sent model # tpw-0900650. That may be why the other unit didn't work, if it is the wrong polarity than it may have damaged the unit. If it is the wrong polarity, I can fix it.Bill
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