Shark Rechargeable Lithium-ION Battery Pack for Use with Shark ION Rocket, IONFlex, and IONFlex 2X Cordless Vacuums (XBAT200) Always be charging - vacuum with one battery while the other charges Removable, rechargeable lithium-ion battery Designed specifically for the Shark ION Rocket, Shark IONFlex and Shark IONFlex 2x cord-free ultra-light vacuums Shark-certified ION power packs come with a 2-year limited warranty Charger not included