The SENIX B25X5 58 Volt Max* 2.5 Ah Lithium Ion battery provides ""fade free"", ""memory free"" power to all SENIX X5 cordless tool models. All SENIX lithium-ion batteries are backed by our 3-year limited warranty for your peace of mind. *58 Volt Max* battery, maximum initial battery voltage (measured without a workload) is 58 volts. The nominal voltage is 50.4.
High Performance: 58 Volt Max* 2.5 Ah lithium-Ion battery provides extended run time for heavy duty jobsite applications
Maximum Productivity: Continuous power delivery without power loss or memory
Compatibility: Fits all SENIX 58 Volt Max* X5 series battery tools
Convenience: Battery power indicator shows the remaining charge for immediate battery charge information
Quick Charge: Complete charge in 90 minutes or less using standard battery charger
Warranty: 3-year limited warranty for peace of mind