IQV40 40V 2.5Ah Lithium-Ion Battery for Ingersoll Rand Power Tools The intelligent Battery Management System allows the battery to communicate with the tool and charger to offer triple battery protection. Prevents over loading, over charging, and over discharging for longer tool and battery life. The IQV40 Series high-power, 40-volt lithium-ion battery delivers a high-charge capacity with low internal impedance for maximum power delivery and run-time. Compatible with any Ingersoll Rand IQV40™ series cordless tool BL4011