Our partner, a mid-sized German enterprise based in Stuttgart, specializes in developing portable medical monitoring devices and lightweight smart IoT wearables for European consumers. Facing a critical technical bottleneck: their new generation mini medical trackers required an ultra-flat rechargeable power unit thinner than 1.2mm, stable constant voltage output, and customizable wiring terminals to match automated German assembly lines. After testing multiple battery suppliers across Europe and Asia, the brand chose Shenzhen VATS Power Source Limited’s 104038 lithium polymer battery as their exclusive power supply solution.

• Dimensional limitation: Traditional thin lithium batteries on the market carried thickness tolerance above 0.5mm, which caused assembly jamming in the client’s precision injection-molded housings;
• Unstable cycle life: Alternative lipo cells only delivered 300–350 charge cycles, leading to high after-sales failure rates for medical devices sold in Germany;
• Compliance barriers: Many overseas suppliers could not provide complete German-language CE and ISO9001 certification documents, bringing risks to German customs clearance and local market access;
• Inflexible customization: Most factories refused small-batch sample testing and could not switch between JST and Molex connectors as demanded by the German client’s dual production lines.

VATS Power deployed its 1mm ultra-thin 104038 lithium polymer cell to fully resolve the client’s pain points. The battery adopts strict dimensional control of 1±0.2mm * 40±0.5mm * 38±3mm, eliminating dimensional deviation issues during automated assembly. Equipped with a nominal 3.7V voltage and a 4.2V maximum charging cutoff voltage, the cell supports 0.2C–1C standard discharge current and 1C peak discharge, maintaining steady power output for low-power medical sensors and wearable chips.

The product delivers a service life of more than 500 charge-discharge cycles, cutting the client’s product after-sales replacement cost by nearly 40%. To fit the German factory’s dual production lines, we offered free switching between JST and Molex connectors, and accepted secondary customization of capacity, voltage and cell size for the client’s follow-up new product iterations. All batches of the 104038 battery carry complete ISO9001 quality system certification and CE safety certificates, with German translated certification files provided free of charge to streamline German import filing procedures.

The German brand submitted sample testing requests for 3 variants at one time. VATS Power finished customized samples within 5 working days and delivered them via air freight to Germany. After passing laboratory performance and safety tests, the client placed a formal mass production order. Our production cycle only took 14 days, far shorter than the 30–40 days lead time offered by European local battery manufacturers.

All finished batteries use industrial-grade carton packaging that complies with international air and sea shipping dangerous goods standards, ensuring zero cell damage during transit to German ports including Hamburg and Munich. Our German-speaking technical team maintained daily real-time communication to answer questions on discharge parameters, storage standards and certification compliance, removing communication barriers for German engineers.

After 8 months of mass delivery, the German customer’s mini medical wearables equipped with the 104038 battery achieved a 0.2% product failure rate, far below the industry average in Germany. Stable battery performance boosted the brand’s market reputation across German medical and consumer electronics channels, and the client signed a 2-year exclusive supply framework agreement with VATS Power.

In the client’s official cooperation feedback, their chief electronic engineer commented: “The 1mm ultra-thin 104038 lipo battery perfectly matches our miniaturized product roadmap. VATS Power’s flexible customization, complete EU certification and efficient logistics support make it our most reliable lithium polymer supplier from Asia."

This case proves that VATS Power’s ultra-thin 104038 lithium polymer battery is a mature, compliant power solution for German miniature medical equipment, GPS trackers, beauty devices and smart wearables. As a direct manufacturer without middlemen, we provide German enterprises with balanced high performance, flexible OEM adjustment, full EU certification and stable cross-border delivery, solving the core miniaturization power supply challenges widely encountered by local German electronics brands.