Black And Decker 244760-00 A1718 Fs18Fl Fsb18 Firestorm Cordless Power, Mh. Replace for black and decker 18v Ni-Mh Battery | 18 Volts Max |Capacity: 4000mAh each, perfect suitable for Black Decker original tools and charger.1Pack Fully compatible with all Black Decker 18V outdoor power tools.Perfectly replace for HPB18-OPE 244760-00 Firestorm Fsx-treme FS18HV FS18ID FSB18 FS18HV FS18PS FS18BX FS180BX FEB180S Adopt industry leading technology to extend battery life. There is no memory effect. It can be charged and discharged as required without capacity loss. All OHYES BAT products are inspected and tested before leaving the factory. FCC, ROHS, CE certified and tested by manufacturer more safety and stability. This battery has a 30-day return and exchange and a 12-month warranty from the date of purchase. We will also provide you with 24-hour comprehensive customer service. Note: This replacement battery has 3 metal pins, as same as the one has 2 metal. It is a temperature control switch. When the temperature of the battery cell reaches the set maximum temperature, the battery will be protected and automatically cut off to achieve the purpose of protecting the safe use of the battery.