Why Batteries Decide the User Experience

Portable CPAP and BiPAP therapy depends heavily on reliable power. Patients expect uninterrupted sleep therapy throughout the night, clinicians require stable airflow pressure and signal accuracy, and device manufacturers must balance size, weight, and regulatory compliance.

A well-designed battery pack is therefore not just a component—it is a critical part of the therapy experience. At PKNERGY, we design rechargeable lithium battery packs that help medical device manufacturers deliver consistent performance while meeting travel and safety requirements.

Many modern medical device manufacturers rely on Custom LiFePO4 Battery solutions or advanced lithium packs to meet strict runtime and safety requirements.

What Your Device Really Needs

• Right bus voltage, right now – Support for native 12V CPAP systems (DreamStation class) and 24V platforms (AirSense class) with efficient DC power paths.
• All-night runtime – Reference packs range from 95Wh airline-compliant travel modules to 250–300Wh overnight backup solutions.
• Medical-grade safety – Designed to support IEC 62133 and UN38.3 certification while enabling device compliance with IEC 60601-1-11 and ISO 80601-2-70.
• Clean power output – Low ripple and low EMI architecture ensures stable therapy signals and quiet operation.
• Travel-ready design – Slim airline-approved batteries under 100Wh or travel-compliant modules within airline spare battery limits.

Many portable medical systems today also adopt customized lithium architectures such as Custom Lithium Polymer Battery packs for lightweight and compact device integration.

PKNERGY Reference Battery Designs

PKNERGY provides several reference battery platforms that can be customized for CPAP and BiPAP manufacturers.

TR-95 (Travel)

• Capacity: ~95Wh ultra-slim lithium pack
• Use case: airline travel and daytime mobility
• Output: 12V direct output or 24V boost
• Chemistry: high energy NMC lithium cells
• Cycle life: 500+ cycles

ON-250 (Overnight+)

• Capacity: ~250Wh compact power pack
• Use case: full-night operation with humidifier
• Output: 12V or 24V / 3.75A continuous
• Chemistry options: NMC or LiFePO4
• BMS: smart protection with temperature monitoring and health tracking

BK-300 (Backup)

• Capacity: ~300Wh modular battery system
• Use case: multi-night backup power
• Output: selectable 12V / 24V rails
• Features: charge-through capability and modular stacking
• Options: IP54 enclosure and airline travel kit

These designs can also be adapted for various portable electronics and healthcare applications using Consumer Electronics Power Solutions or Medical Device Power Solutions.

Engineering That Reduces Project Risk

PKNERGY supports device manufacturers through the entire battery development lifecycle.

• Mechanical integration – slim housings, shock protection, and serviceable battery structures
• Battery electronics and BMS – protection, balancing, data logging, and precise fuel-gauge calibration
• Compliance verification – support for IEC 62133, UN38.3 and medical device battery integration requirements
• Reliable supply chain – dual-source lithium cells and production-ready DFM processes

For manufacturers requiring specialized battery packs, PKNERGY also offers custom lithium battery design services.

Quick Runtime Sizing Guide

A simple rule-of-thumb for estimating CPAP battery capacity:

• Basic CPAP (~30W) → approximately 240Wh for 8 hours
• CPAP with heated humidifier (40–90W) → approximately 320–720Wh for 8 hours

Actual runtime depends on pressure settings, mask leakage, humidifier duty cycle, and power conversion efficiency.

Battery Selection Guide

FAQ