20 Volt Max 5.0 Ah Lithium-ion - Black

The SENIX B50X2 20 Volt Max 5.0 Ah lithium-ion battery provides "fade-free", "memory-free" power to all SENIX X2 cordless tool models. 20 Volt Max battery, maximum initial battery voltage (measured without a workload) is 20 volts. The nominal voltage is 18