Chemistry: Sealed Nickel Metal Hydride (Ni-MH)
Nominal Voltage & Capacity: 3.6V, 550mA
Operating Discharge Temp: -20°C to 75°C
Cycle Life: ≥ 500 cycles (tested to IEC 61951-2 standards)
Connector Type: 51021-4P (Reverse, UL1571 26# AWG
Integrated Thermistor: Built-in NTC 10K for thermal monitoring
Reliable 3.6V 550mAh Ni-MH Backup Power for Automotive T-Box & eCall Systems
The Ni-MH AAA550mAh 3.6V battery pack is a premium, high-reliability power solution specifically designed for automotive telematics
Key Engineering Advantages:
Automotive Temperature Tolerance: Delivers a maximum continuous discharge current of 550mA (1C) across a wide temperature range of -20°C to 75°C
Proven Longevity: Offers a reliable cycle life of ≥ 500 cycles, fully compliant with IEC 61951-2 testing standards
Advanced Safety Integration: Equipped with a built-in 10K±3% B=3435 glass-sealed NTC thermistor, allowing your T-Box BMS to precisely monitor battery temperature for safe charging
Ready-to-Install Design: The pack comes perfectly configured in a side-by-side layout with a maximum thickness of 11.5mm to fit compact T-Box enclosures
| Parameter | Specification |
| Model Number |
Ni-MH AAA550mAh 3.6V |
| Nominal Voltage |
3.6V |
| Rated Capacity |
550mAh |
| Minimum Capacity |
≥ 520mAh |
| Internal Impedance (Ri) |
< 210 mΩ (Pack) |
| Standard Charge |
55mA (0.1C) for 16 hours |
| Maximum Continuous Discharge |
550mA (1C) |
| Discharge Cut-Off Voltage |
3.0V |
| Operating Temperature (Charge) |
0°C to 60°C (Standard) |
| Operating Temperature (Discharge) |
-20°C to 75°C |
| Thermistor (NTC) |
10K±3% B=3435±1% |
| Connector |
51021-4P (Reverse, UL1571 26# AWG) |
| Wire Length |
80±5 mm |
| Pack Dimensions (Max) |
46mm (H) x 32mm (W) x 11.5mm (T) |
| Typical Weight |
Approx. 36g |
