This 12Ah lithium ion replacement battery offers high performance cleaning with extended runtime options. When used with the new GoFree Flex Pro II, a high/low power switch enables the user to vacuum approximately 106 minutes on low for routine cleaning and 75 minutes on high for deep cleaning. This lithium ion battery fully charges in 3 hours with minimum charge cycles of 1000. Only charge with 107516 charger. Replacement battery for 107513. Unsurpassed 2 year warranty.