Rechargeable Lithium Battery 21V and Battery Adapter for Power Tool Battery

Built-in 5 x 1300mAh battery cores, low heat radiation and fast heat dissipation, easy and long endurance. High quality plastic housing, with impact resistance and shock design, wear resistance and high durability. Built-in chip with stable working performance, provides multiple and stable voltage circuit. Purchasing this replacement battery can help you work faster, save time with higher working efficiency.