Driven by accelerating global population aging and the growing trend of home-based healthcare, the market for portable medical devices is witnessing explosive growth. Ranging from multi-parameter monitors in hospital wards, insulin pumps and nebulizers for household use, to point-of-care testing (POCT) analyzers deployed in community clinics, such equipment imposes far stricter requirements on power systems than conventional consumer electronics. Consistent and reliable power supply is directly tied to patient safety, while relevant compliance certifications serve as an essential prerequisite for market access.

Power systems for portable medical devices mainly face three core challenges: sustained discharge stability, capacity retention during long-term storage, and compliance certifications for global market entry.

Unlike consumer electronics for occasional use, medical devices often require uninterrupted power supply for hours or even 24 hours. A steady discharge profile of batteries is therefore critical. Under standard 0.2C discharge conditions, VATS Battery’s lithium-polymer cells maintain a stable voltage plateau between 3.6 V and 3.7 V, with noticeable voltage drop occurring only at the end of discharge. This delivers constant power output throughout most of the operating cycle and prevents device malfunctions caused by voltage fluctuations.

Portable medical devices are not used on a daily basis but activated intermittently according to patients’ needs, which demands extremely low self-discharge for batteries in storage. The monthly self-discharge rate of VATS lithium-polymer batteries is controlled at no more than 3% at room temperature. Even after six months of warehousing and transportation post-delivery, the cells can retain over 80% of their original capacity. The devices are ready for immediate use right out of the box with no extra activation required.

Every medical-grade lithium-polymer battery from VATS is fitted with a dedicated PCM protection circuit board. It integrates four protective functions: overcharge protection (4.25±0.05 V), over-discharge protection (3.0±0.1 V), short-circuit protection (response time <1 μs) and over-current protection. These features effectively eliminate potential risks to patients and medical staff arising from abnormal battery operation.