Wire Harness Connector Compatible: Perfectly compatible with all Peg-Perego 12-volt ride-on toys, this wire harness connector can safely connect to the standard 12 volt SLA and lithium battery ride on toysBattery Adapter Compatible: Perfectly compatible with Milwaukee 18V lithium batteries, works with 48-11-1815, 48-11-1850, 48-11-1820, 48-11-1840, 48-11-1815 etc. Our battery adapter is well-design, snugly fit your battery, easy to install and removeMore Convenient: The battery adapter comes with Wire Harness Connector, with a fuse holder and three 40A fuses, screws, and drywall anchors. Rich accessories to make your DIY work easier, and ideal for 12V Riding Toys! (Note: battery not included)Widely Applicable: Use this battery adapter to power the standard 12 volt SLA and lithium battery riding toys . The max allowable current is 20A for 12AWG wires. You can safely upgrade your toy cars without changing the existing circuitsImportant Note: This adapter is not a charger, it only outputs the voltage and power directly from your battery. If you dont use it for a long time, please be sure to remove the battery from the adapter. "