★ Brand new replacement battery compatible with Harman Kardon Onyx Studio, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4, li11b001f Wireless Bluetooth Speaker.
★ No memory effect. Can be charged or discharged as needed without loss of capacity.
★ Tectra Products are CE certified,tested by manufacturer to match OEM products.
★ Built with multiple circuit protection (over-charging, short-circuit, high-temperature, and surge protection), and high-quality, fire-resistant construction.