Patient-Centric Zero Chemical Risk: Utilizing an inherently stable medical-grade nickel-metal hydride chemistry that completely eliminates volatile thermal runway concerns, ideal for continuous wearable skin-contact devices.
Ready-to-Use Low Self-Discharge Technology: Advanced LSD alloy matrix ensures the battery pack retains 85% or more of its rated capacity even after 12 full months of storage, ensuring the device boots instantly when needed.
Space-Saving Plug-and-Play Integration: Weighing only 52g with a streamlined 4S1P physical layout wrapped in thermal PVC, it drops directly into remote-sized enclosures without layout complications.
Ultra-compact 4.8V NiMH battery packs customized for miniature FES and electro-therapy devices. Zero risk, long shelf life.
🌟 Co-Engineering Patient Empathy and Technical Hardware Integrity for Home-Care Devices
When designing handheld or wearable medical electronics—such as micro pocket functional electrical stimulators (FES) or mini dysphagia trainers—engineering parameters must translate into human peace of mind. These devices are operated daily by patients in the privacy of their homes, often without professional clinical supervision. Our multi-disciplinary battery experts chose a highly stable industrial AAA low self-discharge (LSD) NiMH cell system for this exact environment. By steering clear of more volatile lithium alternatives, we provide medical hardware brands with a zero-chemical-risk architecture. This 4.8V 4.32Wh assembly balances a delicate physical envelope—measuring roughly 45mm x 11mm x 42mm and weighing only 52g—with incredible technical resilience. It ensures that the end-user holds an electro-stimulation device that is as lightweight and familiar as a TV remote control, yet built to uncompromising clinical safety standards.
🛡️ Precision Electrical Fail-Safes and Rigorous Compliance for Global Distribution
From a cell chemistry perspective, reliability is hidden in the finest defensive layout choices. This 4S1P battery configuration is wrapped in eco-friendly medical-grade high-temperature PVC shrink film, further fortified with dual-end insulated Mylar sheets and shock-absorbing EVA pads to easily withstand everyday accidental drops by elderly patients. Electrical integration is managed through a precise 2.0mm pitch JST or Molex connector utilizing a 3-wire system. The critical third wire connects a precision 10k Ohm NTC thermistor positioned flat against the center cell. This enables the host machine’s charging circuit to read thermal data instantly, employing a dual-termination logic (minus Delta V = 5mV/cell and a temperature rise rate dT/dt >= 1 degree Celsius per minute) to stop power before any over-charging stress occurs. While avoiding redundant logistical certs, the batch undergoes comprehensive aging trials and complies fully with globally recognized IEC 62133-1, RoHS, REACH, and CE manufacturing criteria, guaranteeing hassle-free international shipping and lower retail customs overheads.
Specifications
4.8V 900mAh AAA NiMH Battery Pack
Battery Chemistry System
Nickel-Metal Hydride (NiMH)
Cell Size Designation
Industrial AAA / IEC HR03
Cell Configuration
4S1P (4 cells in series)
Nominal Voltage
4.8 V
Rated Capacity
900 mAh / 4.32 Wh
Internal Impedance
Less than or equal to 120 mOhm
Standard Charging Current
90 mA (0.1C)
Smart Charge Termination Logic
-ΔV = 5mV/cell OR dT/dt >= 1°C/min
Maximum Continuous Discharge
1800 mA (2.0C)
Maximum Pulse Discharge Current
3600 mA (4.0C)
Discharge Cut-off Voltage
4.0 V
Storage Charge Retention Rate
>= 85% after 12 months at 20°C
Integrated Thermal Sensor
10k Ohm +/-1% NTC Thermistor
Circuit Over-Current Protection
3A Medical Self-Resettable PTC Fuse
Output Terminal Wiring
2.0mm Pitch JST/Molex Connector
Insulation Cover Materials
High-Temp Medical PVC + Mylar + EVA
Physical Enclosure Dimensions
Approx. 45mm x 11mm x 42mm
Total Gross Weight
Approx. 52 g
Regulatory Compliance
IEC 62133, RoHS, REACH, CE Compliant
Frequently Asked Questions
Sourcing the ideal power cell for home-care therapy electronics involves navigating complex physical and safety trade-offs. Below, our technical staff addresses the common pain points and engineering inquiries faced by hardware developers and medical procurement managers when optimizing miniature medical device performance.
Why should we choose a Low Self-Discharge (LSD) NiMH battery pack over Lithium-ion for an intermittent home FES trainer?
Home-use clinical devices are frequently used in cycles and then left on a shelf for months. Lithium-ion batteries carry distinct volatility risks and deteriorate severely under deep discharge if left empty. Our industrial-grade LSD NiMH chemistry offers a 100% explosion-proof profile and maintains over 85% charge after 12 months of storage, ensuring the patient can instantly turn on the device even after a long hiatus, without battery degradation.
How does the host equipment interact with the 10k Ohm NTC thermistor to ensure foolproof battery safety?
The integrated 10k Ohm ±1% NTC thermal sensor is embedded internally alongside the center cell to map authentic internal temperatures. During 0.5C rapid charging (450mA), your device’s motherboard or charging cradle monitors this resistance curve. By setting a dual-termination logic in your firmware based on -ΔV = 5mV/cell or a dT/dt rise rate >= 1 degree Celsius / min, the charger cuts power automatically if over-charging heat occurs. For specific smart charging schematics, you can view our technical guidelines or send a message directly through our online engineering portal.
What mechanical and vibration mitigation safeguards are engineered within this compact 4S1P configuration?
Since handheld medical hardware is prone to accidental drops, the structural assembly requires rigorous protection. We apply high-dielectric insulated Mylar sheets across both contact terminals and sandwich the outer sides with resilient, shock-absorbing EVA foam inserts. The entire structural core is encapsulated via high-temperature medical PVC shrink wrap, forming a highly compact soft-pack block (45mm x 11mm x 42mm) that absorbs impact energy seamlessly.
Does this medical NiMH battery pack require complex air freight dangerous goods clearance?
No, this is one of the premier distribution benefits of our nickel-metal hydride chemistry. Because it complies fully with IEC 62133-1, CE, RoHS, and REACH frameworks, it is exempt from the strict shipping regulations governing lithium batteries. It requires no dangerous goods air transportation testing or complex packaging declarations, enabling friction-free global shipping and ultra-low retail shipping overheads.
Can HIMAX customize the output interface, wire gauge, or structural footprint for our custom medical housing?
Absolute adaptability is our primary B2B value proposition. While our default catalog specification comes with a 2.0mm pitch JST/Molex 3-wire jack, our factory can configure alternative connector brands, adjust copper wire lengths, or modify the physical block structure (e.g., standard flat line vs 2×2 grid form) to fit your custom electronics bay. To initiate an engineering review, please fill out the specialized questionnaire on our Inquiry Page or contact our sales team
