【Fully compatiblity】replacement Battery Compatible with Harman Kardon Onyx Studio 4, Onyx Studio 3, Onyx Studio 2, Onyx Studio 1 Wireless Bluetooth Speaker. Part Number: LI11B001F 【Battery Specification】 High Capacity: 3200mAh, Voltage: 3.7V. Rechargeable Li-ion battery 【Screwdriver Tool】The Onyx Studio 4 battery comes with a screwdriver tool, which allows you to easily replace the old battery. Oyomba is committed to providing thoughtful and attentive service to every customer 【Multiple Protection】Harman kardon replacement battery built in overcurrent, overcharge, overvoltage, overheating, shortcircuit protections, ensure battery safety 【Customer Service】We provide a 30-day money-back guarantee and a 12-month warranty. customer support is available 24/7. For any battery questions, contact us whenever you need ! This 3200mAh replacement battery is designed for Harman Kardon Onyx Studio 1, 2, 3, and 4 Wireless Bluetooth Speakers, with part number LI11B001F. It is a rechargeable 3.7V Li-ion battery. The package includes a screwdriver tool for easy installation. The battery features built-in protections against overcurrent, overcharge, overvoltage, overheating, and short circuits. We offer a 30-day money-back guarantee and a 12-month warranty, with 24/7 customer support available for any questions.