21.6V 75.6Wh 4000mAh Battery for Shark XSBT620 XSBT600 IZ162H IZ163H IZ362H IZ36. New Shark IZ300 Vacuum Cleaner Lithium Battery 21.6V 4000mAh XSBT600. The NON-OEM batteries suitable for the Shark IZ300 have been rigorously tested to ensure safety.
eBay