Project Overview
A European startup focused on sleep aid device development approached PKCELL to design a custom rechargeable battery pack for their portable sleep aid night light system.
The product was originally developed for professional musicians who are extremely sensitive to noise and light environments. Later, the team decided to enter the consumer electronics market, where portable, battery-powered designs became essential.
Their key requirement was a high-energy-density lithium battery pack that could fit into a compact enclosure while delivering long runtime and stable performance.
Portable Sleep Aid Night Light Device
The sleep aid device integrates:
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Ambient night light
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White noise sound module
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Multi-scene light projection
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Low-noise electronic control system
It is designed for:
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Urban users are sensitive to noise
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Musicians and creative professionals
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Frequent travelers who need quick sleep induction
This made battery performance, safety, and reliability critical to the overall user experience.
Key Battery Challenges
The customer faced several battery-related challenges:
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Limited internal space for battery installation
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Requirement for a 12V lithium battery pack
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At least 7 days of runtime on a single charge
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Stable output for both lighting and sound modules
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Safe, rechargeable solution suitable for consumer electronics
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OEM-ready battery design for future mass production
After evaluating the device structure and power consumption, PKCELL provided a custom lithium battery pack solution tailored to the product.
Battery Specifications
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Battery Type: Rechargeable lithium battery pack
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Configuration: 3S1P
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Cell Type: 21700 lithium-ion cells
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Capacity: 5000mAh
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Nominal Voltage: 11.1V (12V system compatible)
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Application: Portable sleep aid device/night light
This configuration ensured high energy density, compact size, and long cycle life—ideal for portable electronic devices.
Performance Results
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Continuous operation for over one week per charge
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Stable voltage output during full discharge cycle
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Excellent compatibility with light and audio modules
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Passed prototype testing and functional validation
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Ready for OEM battery pack production
The battery-powered version significantly improved the product’s portability and expanded its use scenarios.
Why Custom Battery Design Matters
Compared with off-the-shelf batteries, PKCELL’s custom battery pack offered:
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Better space utilization
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Optimized voltage and capacity
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Enhanced safety protection design
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Improved user experience
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Easier transition to large-scale manufacturing
This highlights the importance of battery customization for innovative consumer electronics.
Project Outcome
The customer successfully transitioned from an AC-powered prototype to a portable, rechargeable battery-powered product.
They are now preparing for market launch across Europe, with plans to expand into additional sleep aid device designs in the future.
PKCELL will continue to provide custom lithium battery solutions to support product upgrades and new models.
Looking for a Custom Battery Pack?
PKCELL specializes in:
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Custom lithium battery packs
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12V rechargeable battery solutions
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OEM & ODM battery design
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Battery solutions for consumer electronics, medical devices, and smart products
Tags
The night light creates a calm, immersive environment that allows me to fall asleep naturally—even in the city.