Purchase on Amazon. Description- battery
Fits these machines: BH50030- Hoover Linx Cordless Hand Vacuum, BH50010- Hoover Linx Cordless Stick Vacuum, CH20110- Hoover Commercial Vacuum, BH50005- Hoover Platinum Linx Cyclonic, BH50015- Hoover Linx Cordless Hand Vacuum
I am sure you can look up for other parts on Amazon too.
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