The replacement battery features a durable and interchangeable battery. The efficient 2,000 mAh battery provides enough power for 40 minutes of continuous suction. The battery retains up to 70% of its original capacity after 500 charge cycles. You can easily swap out the battery for another 40 minutes of suction. It is a lithium-ion battery with a voltage of 21.6 V. The runtime is a maximum of 40 minutes, an average of 20 minutes, and a minimum of 5 minutes. It comes with a charging station for two batteries. The charging time is 3 hours and 30 minutes, and the battery is replaceable.