Factory Price 3.7v 3000mAh Lithium Battery Replacement for Harman Kardon Onyx Studio 4 Bluetooth Speaker

Specifications

Company Profile

Product overview

Deliver dependable, long-lasting playback for your Harman Kardon Onyx Studio 4​ with this precision-engineered 3.7V 3000mAh​ lithium-ion replacement pack. Designed as a true drop-in OEM retrofit, it integrates a high-reliability protection board to suppress overcharge / over-discharge / short-circuit​ events while preserving the speaker’s original charging logic and sound profile.

The pack is calibrated to the speaker’s native power draw, helping restore runtime and reduce mid-playback voltage sag without firmware changes, soldering, or mechanical alterations. Every unit undergoes pre-shipment validation for capacity, internal resistance, and self-discharge, and is backed by a 12-month​ warranty for worry-free ownership.

This battery targets a typical energy of 11.10Wh（3.7V × 3000mAh）to align with the speaker’s design envelope, supporting extended listening sessions at moderate to high volumes. The cell chemistry and protection profile are selected to minimize voltage sag during dynamic passages and lower the risk of unexpected shutdowns, so your playlists keep flowing from the first track to the last.

Key Applications & Features:

•Direct Replacement: This battery is a perfect fit and functional equivalent to the original battery in your Harman Kardon Onyx Studio 4 (Model: Onyx Studio 4). No modifications required.

•Restore Wireless Freedom: Say goodbye to being tethered to a power outlet. Enjoy true cordless audio for hours of uninterrupted music, podcasts, and entertainment.

•Sustained Power & Performance: With a reliable 3000mAh capacity and stable 3.7V output, this battery ensures your speaker delivers the powerful, crystal-clear sound it was famous for, from the first track to the last.

•Enhanced Playback Time: Get back to enjoying extended listening sessions. A fully charged battery provides ample power for a full day of casual use.

•Easy DIY Installation: Comes with clear instructions, allowing you to easily replace the old battery yourself in just a few minutes, saving you time and costly repair fees.

•Built with Safety & Longevity: Manufactured with high-grade Li-ion cells and equipped with built-in protection circuits against over-charge, over-discharge, and short circuits, ensuring safe and durable operation.

Workers Production

Product Package

Why Choose Us?

I.Factory Direct Supply, Significant Price Advantage

We offer this 3.7V 3000mAh lithium battery replacement for the Harman Kardon Onyx Studio 4 Bluetooth speaker directly at factory prices. By eliminating intermediaries, you can obtain high-quality batteries at highly competitive prices, saving costs while enjoying great value.

II.Excellent Quality, Strict Inspection Process

We conduct rigorous quality inspections on every single battery, from raw material selection to production process monitoring and final product inspection before shipment. Each step is carefully controlled to ensure the battery has stable performance, long endurance, and good safety, providing reliable power support for your speaker.

III.Precise Fit, Perfect Compatibility

This battery is specifically tailored for the Harman Kardon Onyx Studio 4 Bluetooth speaker. It highly matches the original battery in key parameters such as voltage, capacity, and size, ensuring perfect compatibility with your speaker device. You can use it normally after installation without worrying about compatibility issues affecting the speaker's performance.

IV.Professional Service, Worry-Free After-Sales

We have a professional customer service team ready to answer any questions you may have about the battery at any time. Moreover, we offer comprehensive after-sales service. If you encounter any problems during use, we will handle them promptly, allowing you to purchase and use with peace of mind.

V.Fast Shipping, Efficient Delivery

We have established long-term and stable cooperative relationships with multiple well-known logistics partners, enabling us to have efficient shipping and delivery capabilities. After your order is confirmed, we will arrange shipment as soon as possible to ensure you receive the required battery quickly and minimize waiting time.

Certification

FAQ

Q1: Is Foshan Softchip Electronics Co., Ltd. an original factory?

A: Yes, Foshan Softchip  Electronics Co., Ltd. is an original factory. We directly engage in product manufacturing, eliminating intermediary links and enabling us to offer customers more cost-effective products.

Q2: How many years of production experience does your company have?

A: Our company has 13 years of production experience. Over the long-term practice, we have accumulated rich technical and management expertise, allowing us to efficiently and steadily produce high-quality products.

Q3: Does your company have complete production equipment?

A: Absolutely. We possess complete and advanced production equipment that covers all aspects from raw material processing to finished product assembly. This provides a solid hardware guarantee for the quality of our products.

Q4: What are the main products your company produces?

A: Our company mainly produces batteries for various models of JBL speakers and iPhone batteries. These products undergo strict quality inspections and have stable and reliable performance.

Q5: Is there a guarantee for product supply when cooperating with your company?

A: There is definitely a guarantee. As an original factory, we have strong production capacity and a stable supply chain system. We can arrange production in a timely manner according to customer needs to ensure on-time and sufficient supply.