The Challenge:
Our customer aimed to create a compact, premium wireless speaker that could deliver powerful, clear audio with at least 12 hours of playback. Their amplifier required a higher voltage (typically 7-9V) to produce clean, undistorted sound at higher volumes without a bulky internal boost circuit. The main constraint was extremely limited internal space, demanding a battery with high energy density and a sleek, stackable profile that wouldn't compromise the speaker's acoustic design or portability. 

Our Solution:
Our 7.4V 1450mAh Li-Polymer Battery provided the ideal power foundation for high-quality audio amplification.

• Direct-Drive Amplifier Compatibility: The 7.4V output closely matched the optimal input voltage for the Class-D amplifier, maximizing efficiency and minimizing power loss as heat. This directly contributed to cleaner sound reproduction, especially at higher volumes.

• Compact Energy Density: The relatively high voltage meant that the 10.73Wh of total energy could be delivered from a smaller pack than a comparable 3.7V solution, allowing the speaker to maintain a slim product profile.

• Low-Noise Operation: The battery's stable discharge curve and high-quality construction prevented electrical noise that could interfere with sensitive audio components, ensuring the speaker delivered on its high-fidelity promise.

• User-Centric Safety: Beyond standard protections, the BMS was optimized for seamless integration with the speaker's software, providing accurate battery level indicators and safe charging via USB-C.

Key Specifications Highlighted:

• Nominal Voltage: 7.4V (Ideal for audio amplifiers)

• Energy: 10.73Wh

• Dimensions: Approx 53.5*51x 12mm

• Standard Discharge Current: 1C - optimized for sustained audio playback, not peak power.

• Weight: Approx 65g

Results & Feedback:
The speaker received critical acclaim for its "surprisingly powerful sound" and excellent battery life, often exceeding 13 hours in reviews. The efficient power system was cited as a key differentiator. Lead Acoustic Engineer commented: "Choosing this 7.4V battery was a strategic decision for sound quality. It allowed us to design a more efficient amplifier path right from the start. The result is a purer audio signal and a product that truly stands out in a crowded market."