Tips for purchase: Please make sure the battery type, voltage and model are compatible with yours. Please compare the shape and the appearance of the battery with yours to ensure they are the same. Please contact us first if you are not sure about the compatibility. Specifications: Voltage: 3.6V Capacity: 4000mAh Battery type: Ni-MH Replace for these batteries: Black&Decker: 383900-004, 151995-02, 388183-00 (The battery is 4.5". It can not replace for the Type 2 battery, which is the shorter one.) Fit for these devices: Black&Decker: S100, S110, Versapak VP100, VP110, VP130, VP-100, VP230, VP321, VP368, VP510, VP130K, VP600, VP650, VP660, VP940, VP1800-A T1, VP215-A T1, VP2000, VP3621, VP4000, VP4100, VP4200, VP4300, VP7221, VP7221C, VP7251,VP7251C.
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