Fangrui Product Details [compatible For For ]: Work With For 18v-36volt Battery For 18v Battery 339782 Bsl1830c Bsl1815x Bsl1815s 330139 Bsl1830 330557 Li-ion Batteries. Easy To Install,locks On You Battery Very Well. [easy To Diy Operat]: The Adapter Is Equipped With Wiring Terminals, Which Is Convenient To Connect The Power Cord Of The Device With The Power Cord Of The Adapter Faster And Better. [better Security]: The Adapter Is Equipped With A Fuse And High-quality Wire To Prevent Excessive Transient Current From Damaging The Battery And Equipment. You Can Use It Safely. [multi-scene Use]: Adapter Has 14 Gauge Wire Installed; You Can Use It To Upgrade Your , Rc Toys, Robotics Diy Etc. Maximum Permissible Current 20a. This Adapter Surely Allow You To Quickly And Safely Upgrade Your Power Wheel And Enjoy The Beauty Of Diy. [tips]: The Red Wire Is Connected To The Positive Terminal, And The Black Wire Is Connected To The Negative Terminal. When Using, Make Sure That The Positive And Negative Wires Of The Device Correspond To T