Running a Makita 18V 2Ah (also tried a 9Ah) battery to a voltage reducer on my sons Peg Perego ground force tractor. Everything besides 2nd gear works. When I remove the reducer
18V 2Ah Battery For Makita BL1840G BL1830G BL1820G 195608-4 BL1813G HP DF 457D | eBay