NAVAC NBP2 is a rechargeable lithium-ion battery used to power the NAVAC NP2DLM and NP4DLM Cordless Vacuum pumps. It has a high output of 18V 9Ah 162Wh, is built with a USB Output and Battery Life Indicator, and has a 2-year Warranty. Having an extra NBP2 Battery allows you to use your NP2DLM/NP4DLM Cordless Pumps continuously without worrying about running out of power while getting the job done.