Product details:

Compatible with the M18 power system, this M18 18V Lithium-Ion XC Extended Capacity Battery Pack provides more power, more run-time and more life than a standard lithium-ion battery, allowing your tools to run longer. Using complete system communication between the tool battery and charger, Redlink intelligence delivers superior performance while offering overload protection. The featured onboard fuel gauge shows remaining runtime. To keep you working in harsh weather conditions on jobsites, it offers fade free power.