Powerextra Euro Pro Shark 6V 4000mAh Replacement Battery for Shark V1911N V1911-FS V1911FS 6V, 4000mAh Ni-MH replacement battery for Euro Pro Shark vacuum Works with Shark V1911N V1911-FS V1911FS Engineered and manufactured to Euro Pro Sharks OEM battery standards Restore your Shark to work like new 30 days money back guarantee and 12 month limited warranty