tanheyin 18v to 12v step down converter for milwaukee m18 battery, 240w dc 12v voltage regulator for power wheel adapter, ride on toy car, diy projects, buck converter with switch & over-discharge protection 1 pack is up for auction in Tools & Home Improvement. The current bid is $0.35, 98% below the $21.59 MSRP, in New/Like New condition. Bid on this item at our Amelia - Ohio Pike location before the auction closes.