Perfectly compatible for 18v battery series: such as 48-11-1851, 48-11-1837, 48-11-1880, 48-11-1828, 48-11-1812, 48-11-1811, 48-11-1822, 48-11-1850, 48-11-1852, 48-11-1865, 48-11-1860, 48-11-1862, 48-11-1890, 48-11-1835, 48-11-1840, 48- 11-1820, 48-11-1815, etc.New Upgraded Battery Adapter: The new battery adapter uses thicker copper sheets and thicker copper core wire (12AWG Wire) and has upgraded soldering technology. The new battery adapter is more conductive, generates less heat, and is more durable than the old battery adapterSafer: The new version 2.1 of the adapter adds a safety module, which can effectively prevent the device from burning down due to DIY errors or overloadingSimpler: This version of the adapter also adds a switch module, which is more convenient to use after DIYGood quality: Made of high-quality plastic, heat-resistant and corrosion-resistant, suitable for various environmentscolor:RedMaterial:plasticPackage Contents:1 x wheels adapter4 x fuseOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.