In early 2025, a European startup approached LYW Battery with a unique challenge—developing a lightweight, compact, and long-lasting battery for their upcoming AI-powered smart translation device. The product was set to launch at the summer tech expo and required strict design and performance standards.
🔍 The Challenge
The client’s requirements included:
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Battery capacity: At least 1000mAh to support 6+ hours of continuous voice translation
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Size constraints: The housing allowed no more than 5mm thickness
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Weight limit: Less than 20g to ensure user comfort during handheld use
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Charging time: Full charge within 1.5 hours via USB-C
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Safety: Certified for air shipment and CE/UN38.3 compliant
Other suppliers had proposed standard models that failed to meet either size or performance needs. That’s where our custom solution came in.
🔧 The Solution
Our engineering team at LYW Battery proposed a custom 1200mAh LiPo battery, using a slim 3.7V pouch cell with optimized energy density and enhanced fast-charging capability.
Key features we delivered:
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Thickness: only 4.8mm, precisely within tolerance
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Cycle life > 500 times, ensuring longevity for frequent users
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Custom connector and protective PCM, perfectly matching the client’s PCB
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Passed UN38.3 and IEC62133 tests, ready for global shipment
We provided 3D CAD drawings, prototype samples, and mass production molds within 3 weeks.
✅ The Results
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The client successfully launched their product on time, receiving positive feedback for battery life and portability
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Return rate: < 0.2% after 10,000 units shipped
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The startup is now working with us on their next-generation translator and wearable products
📦 Custom Battery Solutions That Fit Your Vision
At LYW Battery, we specialize in polymer lithium battery customization from 100mAh to 2000mAh. Whether you’re building wearables, medical devices, or smart electronics, we offer tailor-made battery packs that meet your design, safety, and performance goals.
👉 Contact us today to bring your idea to life with a reliable power source.
