Industry Background: The Rise of Wireless PSAPs

Wireless Personal Sound Amplification Systems (PSAPs) have rapidly evolved into an important category in modern
hearing-assistive and consumer audio technology. :contentReference[oaicite:1]{index=1}

Unlike traditional hearing aids, PSAPs enhance sound clarity for a broader user base—students, seniors, professionals,
outdoor users, and anyone needing improved hearing in daily communication.

Modern PSAPs integrate:

• Bluetooth LE Audio
• AI noise reduction & environment detection
• Directional microphone arrays
• Low-latency DSP signal processing

These features dramatically increase power consumption, making high-performance lithium batteries
the core of PSAP device reliability, comfort, and user retention.

Key Power Challenges in PSAP Devices

1. Rising Power Consumption Affecting Battery Runtime
   AI algorithms, multi-mic arrays, and real-time DSP significantly increase energy demands. PSAPs require
   high-energy-density batteries to support all-day use. :contentReference[oaicite:2]{index=2}
2. Ultra-Compact Form Factor
   PSAPs must remain extremely small and lightweight, limiting space for battery placement and requiring thin,
   customizable lithium packs.
3. High Safety Requirements for Skin-Contact Wearables
   Batteries must comply with UN38.3, IEC 62133, and include multi-layer protection for long-term safe usage.
4. Dependence on Stable Voltage Output
   Voltage fluctuations can cause Bluetooth instability, DSP errors, and changes in sound amplification performance.
5. Need for Modern Charging Methods
   USB-C, magnetic charging, and charging cases require battery systems that integrate safely with new charging standards.

Why Lithium Batteries Are Essential for PSAP Performance

Advanced lithium batteries—Li-ion, Li-polymer, and micro cylindrical—enable PSAPs to offer comfort, extended
runtime, and high acoustic performance. :contentReference[oaicite:3]{index=3}

• High energy density supports all-day use
• Lightweight design improves comfort for long-term wear
• Stable output ensures reliable DSP and wireless audio
• Custom shapes for ultra-compact structures
• Long cycle life reduces maintenance and replacement rates
• Eco-friendly & rechargeable for sustainable product design

For unique PSAP housing geometries, PKNERGY offers

ultra-thin wearable battery solutions
, including curved and micro-sized packs.

Technical Insights: LiPo, Micro Cylindrical & High-Drain Batteries

PSAP devices typically adopt a mixture of ultra-thin LiPo packs, micro cylindrical cells, and reinforced PCM/BMS designs
depending on output and runtime requirements. :contentReference[oaicite:4]{index=4}

1. Ultra-Thin Lithium Polymer Batteries

• Typical thickness: 3–6 mm
• Cycle life: 300–800 cycles
• Highly customizable for PSAP form factors
• Suitable for ear-hook, in-ear, or clip-on designs

2. Micro Cylindrical Cells

• Examples: 10180, 10220
• High volumetric energy density
• Strong metal housing for durability
• Ideal for modules requiring robustness

3. High-Drain Lithium Polymer Batteries

• 1C–3C discharge capability
• Reinforced PCM/BMS for high-power DSP and wireless load

4. Required Safety & Charging Protections

• Over-voltage / Under-voltage protection
• Over-current / Short-circuit protection
• NTC temperature sensing
• Compatibility with USB-C / magnetic charging

For medically oriented PSAP models, PKNERGY supports certification-ready solutions through its

Medical Device Power Solution
platform.

Typical Application Scenarios

High-performance lithium batteries power PSAP devices used in: :contentReference[oaicite:5]{index=5}

• Senior hearing enhancement
• Meetings, lectures & professional listening environments
• Outdoor & sports activities
• Entertainment audio improvement
• Consumers with mild hearing loss

These devices blend medical-level signal processing with
consumer electronics power technologies.

PKNERGY Custom Battery Solutions for PSAP Systems

PKNERGY develops custom lithium batteries for manufacturers building next-generation PSAP devices, including: :contentReference[oaicite:6]{index=6}

• Custom LiPo battery packs — ultra-thin, lightweight, flexible shapes
• Micro cylindrical lithium modules — high-density, durable metal casing
• High-drain lithium solutions for DSP and wireless systems
• PCM/BMS integration with multi-layer safety
• Support for USB-C & magnetic charging architecture
• UN38.3 / IEC62133 certification documentation

For future PSAP product roadmaps, PKNERGY also evaluates next-generation chemistries via its

sodium-ion battery customization
program.

PSAP Battery FAQ