✔【Upgrade to Lithium Battery】Voltage: 18V | Capacity: 4.0Ah | Not just a replacement, our high capacity Li-ion battery is designed to improve your experience with Roomba by extending the vacuuming time from less than a hour to at least 2 hours on a single charge. Now your Hoover Linx won’t have to be charged multiple times for one cleaning job. ✔【Upgraded in Longevity】Thanks to its 1000 times recharge cycle and 1% low self discharge rate。The 18V battery gives you the ability to clean throughout your whole home with superior run time,rapid charge time and fade free power. ✔【Safety Assured】One of the few battery cell selection with UL cetified in the market of Roomba replacement batteries, equipped with battery management system(BMS) that can effectively protect the battery from potential damage caused by short circuit, over-charge/discharge, over-voltage and over-heating. ✔【Full Compatibility】Perfectly replacement for Hoover LiNX battery BH50000, 302723001, Hoover Linx Cordless Stick Vacuum Cleaner BH50010 BH50020. ✔【 What You Get ？】1* 4.0Ah Replacement Battery for Hoover Linx 18V Battery + 1* User Manual + Excellent Service:{Free refund or replacement for 1.5 year !!} & {24*7 hours prompt after-sales service.} Brand TenHutt Voltage 18 Volts Amperage 4 Amps Unit Count 1 Count Reusability Rechargeable Manufacturer TenHutt Battery Weight 0.89 Pounds Item Dimensions 5.7 x 3 x 2.8 inches Antenna Location Vacuum Cleaner Battery Capacity 4 Amp Hours Battery Cell Type Lithium Ion Number of Batteries 1 Lithium Ion batteries required. (included) Warranty Description 1.5 Year free replacement and refund!