HIMAX 4.8V 800mAh AAA Cell NIMH Battery Pack For RFID & NFC Devices
High-Retention 4.8V NiMH Backup Solution: Engineered with Low Self-Discharge (LSD) Technology and Tailored Connector Form Factors for Smart Infrastructure.
High-Torque 2C Actuation Capability: Engineered to deliver a continuous and peak discharge current up to 1600mA, reliably driving heavy electronic deadbolts and DC motors without causing host controller voltage brownouts.
Advanced LSD Lattice Chemistry: Features low self-discharge matrix technology to maintain >85% capacity retention after 6 months of storage, ensuring emergency access availability even after prolonged device dormancy.
TQM Float-Charge Framework: Manufactured within an ISO 9001 and TQM manufacturing ecosystem, utilizing specialized anti-corrosive grid plates designed to satisfy CE, IEC 62133, and UN38.3 performance baselines under constant micro-trickle charging.
Form-Factor Optimized Power for Next-Gen Smart Access
A tight 10.5mm profile paired with robust Nickel-Metal Hydride chemistry. Eliminate thermal runaway risks while securing tailored wire-to-board integration.
🔬 Electrochemical Stability & Total Quality Thermal Safety
From an electrochemical perspective, enclosed smart access control environments—such as sealed hotel door locks or wall-embedded terminal boxes—present severe thermal challenges for lithium-based chemistries. Extended periods of micro-trickle charging combined with limited dissipation can accelerate lithium plating, increasing the risk of volatile thermal runaway. The HIMAX 4.8V 800mAh NiMH architecture utilizes an advanced oxygen recombination gas cycle mechanism that inherently mitigates overcharge pressures.
Our cells incorporate a premium low self-discharge (LSD) lattice matrix within the negative hydride alloy electrode, ensuring the pack retains over 85% of its nominal capacity after 6 months of inactive storage. To guarantee absolute field reliability, every production batch undergoes a rigid Total Quality Management (TQM) workflow. This includes a 100% automated capacity grading process, high-temperature accelerated aging testing, and precision internal resistance matching. By stabilizing the active material matrix against grid corrosion during long-term float-charging, this configuration eliminates continuous float degradation, delivering an exceptionally stable chemical framework that aligns with global safety baselines.
For field deployment engineers, the true bottleneck in deploying backup power for RFID and NFC locksets lies in the physical constraints of the enclosure and the transient peak power requirements. Actuating an electronic deadbolt or a DC motor requires an instantaneous burst of high current without inducing a severe voltage drop that might trip the micro-controller’s brown-out protection. The HIMAX 4.8V AAA 4S1P pack is engineered to deliver a robust 2C continuous and peak pulse discharge current (1600mA), effortlessly powering heavy-duty locking mechanisms.
Understanding that no two hardware enclosures are identical, HIMAX provides an engineering-driven customization path. Our standard 10.5mm x 42.0mm x 44.5mm square layout can be adapted to linear or custom staggered geometric configurations to fit tightly within ultra-narrow form factors. We offer granular OEM/ODM variations for terminal connections, matching standard JST XH 2.54mm, DuPont 2Pin, or Molex interfaces, alongside customizable wire length and AWG specifications. Additionally, our manufacturing framework incorporates high-frequency automated spot-welding validation to secure all inter-cell connections against intense mechanical vibration and structural shock, ensuring seamless plug-and-play rail logic integration into host PCB designs.
Specifications
NIMH AAA 4.8V 800mAh Battery Pack
Brand
HIMAX Battery
Battery Type / Chemistry
Industrial Nickel-Metal Hydride (NiMH) Pack
Cell Configuration / Model
4S1P Array / AAA High-Capacity Grade-A Cells
Nominal Voltage
4.8V
Fully Charged Voltage
~5.6V to 5.8V under active charge termination
Discharge Cut-off Voltage
4.0V recommended for system rail health
Nominal Capacity
800mAh
Total Rated Energy
3.84Wh
Internal Resistance
<120 mΩ@1kHz matching setup
Standard Charging Current/Method
0.1C (80mA) constant current for 14 to 16 hours
Max Charging Current
0.5C (400mA) with strict temperature and -△V termination control
Max Continuous Discharge Current
2.0C (1600mA) for rapid actuation cycles
Operating Temp (Discharge)
-20°C to +60°C for versatile climate deployment
Operating Temp (Charge)
0°C to+45°C during standard trickle floating
Cycle Life (with DOD%)
300 full cycles at 100% DOD; extended under shallow float drops
Physical Dimensions
Approx. 10.5mm x 42.0mm x 44.5mm [Customizable Geometric Configurations]
Approximate Weight
Approx. 52.0g per pack
BMS/PCM Protection Functions
Polarity reversal prevention, passive thermal fuses available upon request
UL1007 24AWG, Standard 100mm Red/Black [Custom Lengths Supported] (UL1007 24AWG)
Frequently Asked Questions
Welcome to the HIMAX Technical Knowledge Center for the 4.8V 800mAh AAA NiMH battery series. This engineering-focused reference matrix is compiled by our core R&D laboratory to address deep hardware integration, electrochemical characteristics, long-term degradation management, and custom B2B manufacturing workflows for communication and electronic locking infrastructure.
Why should an engineer choose Nickel-Metal Hydride (NiMH) over Lithium-ion chemistry for sealed RFID/NFC electronic lockboxes?
In enclosed, unventilated hardware housings such as smart hotel doors or brick-mounted access pillars, ambient heat combined with localized power rail dissipation poses a critical risk to lithium-ion packs. If lithium-ion batteries undergo continuous micro-overcharging or internal damage, they are susceptible to violent thermal runaway, producing intense fires and hazardous gas emissions. The HIMAX 4.8V NiMH chemistry relies on an aqueous electrolyte system that is inherently non-flammable and stable. It incorporates an internal gas recombination matrix that handles long-term trickle charges safely, providing a secure, fire-risk-free solution for public and commercial safety infrastructure.
How does this battery handle the high transient peak currents required by electronic deadbolts without tripping the system's MCU?
Electronic solenoids and DC latch motors demand instantaneous high pulse currents (often up to 1.5A–2A) during the initial mechanical engagement. If a backup battery pack has excessive internal resistance, this load causes a sharp voltage drop (brownout), resetting the system’s microcontroller. The HIMAX 4.8V pack utilizes high-grade A-class AAA cells with automated internal resistance matching (< 120 mΩ). Its robust 2C continuous and 3C pulse delivery infrastructure ensures that even under maximum motor load, the system voltage remains well above the critical logic rail threshold, ensuring smooth unlocking operations.
Since the battery will remain connected to the main power rail for years, how does it mitigate continuous float-charge degradation?
Constant micro-trickle charging can accelerate positive grid corrosion and active material degradation in standard batteries. To combat this operational challenge, HIMAX utilizes a specialized anti-corrosive alloy matrix for the plate grids and an optimized chemical formulation that balances gas generation and recombination rates perfectly at $0.05\text{C}$ to $0.1\text{C}$ trickle rates. Our manufacturing lines implement rigorous TQM testing—such as high-temperature accelerated floating tests—to ensure our design satisfies long-term stability baselines, offering a reliable 3 to 5-year float service life without structural capacity collapse.
What are the exact physical and electrical boundaries of HIMAX's OEM/ODM customization capabilities?
Our customization workflow is designed for seamless B2B integration. Mechanically, while the default setup is a compact square 4S1P arrangement, we can re-engineer the form factor into a flat linear row, a dual-layer column, or custom staggered geometries to clear specific mechanical obstacles inside your chassis. Electrically, we offer tailorable terminal integrations matching standard JST XH 2.54mm, DuPont 2P, Molex, or Hirose connectors, paired with variable AWG wire specifications and lengths. Every customized unit is produced under an ISO 9001 and TQM manufacturing framework, ensuring cross-batch physical precision.
How should the host device's charging rail logic be configured to interact optimally with this NiMH backup pack?
For long-term backup environments, the host hardware board should feature a dual-mode charging rail logic. When a power-cut recovery event occurs, the charging system can supply a controlled constant current at 0.1C (80mA) to slowly top up the pack. Once fully charged, the rail logic should automatically transition to a micro-trickle regime between 0.02C and 0.05C to overcome low natural self-discharge losses without overstressing the matrix. The pack chemistry and build alignment satisfy the rigid baseline testing protocols found in global standards like IEC 62133 and CE, facilitating direct approval integration on the device level.
