Item Type: Battery Adapter Material: ABS 1. Top of Converter: Compatible for Worx 20V cordless power tools, can be used for WG151 WG251 WG540 WG891 WG151 WG151.5 WG800.1. The corresponding lithium battery is for Worx 20V WA3520 WA3525 WA3575 WA3578 electric tool battery 2. Bottom of Converter: Suitable for battery: for BL1815 BL1815B BL1820 BL1820B BL1830 BL1830B BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B BL1845 BL1890 BL1890B and more 18V lithium battery 1Applicable Models: The top of this adapter is compatible for Worx WG151 WG251 WG540 WG891 WG151 WG151.5 WG800.1 6 pin 20V cordless power tools. 2Applicable Battery: The bottom is applicable for BL1815 BL1815B BL1820 BL1820B BL1830 BL1830B BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B BL1845 BL1890 BL1890B and more 18V lithium battery. 3Highly Adaptable: The adapter is highly compatible with tools and batteries, and will not fall off and shake during use, which is safe and reliable. 4ABS Shell: The shell is made of high strength and toughness ABS material, the adapter is strong and sturdy, will not easily broken. 5Easy Installation: The adapter is integrally formed without burrs, with smoothly surface, easy to install and use.1 x BatteryAdapter1. The adapter has a protective plate. When not in use for a long time, separate the battery from the adapter to avoid damage to the battery. 2. This converter does not support for 18V lithium battery and for Worx 20V lithium battery shared charger.