and safety to use,The dock holder of battery upgrade is made of ABS and PC with moisture,corrosion,impact resistant,could be used both indoors or outdoors. battery adapter has 14 AWG wire installed(with 30A Fuse & Switch) Compatibility: Adapter Compatible for 40V Lithium-Ion battery BL4050 BL4030 BL4020 BL4050F BL4025 BL4080F and more. You can make the 40V batteries power your other devices with this adapter. Easy to install and locks on your battery. Voltage: for 40V battery. Replacement Fuses: 30A (Max) Colour:blue Material:abs Package Contents: 1 x Remove electrical appliances (Battery not included) Only 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.