4/5 A Ni-MH Rechargeable Battery 2100mAh 1.2V Cylindrical Cell

Q: What is cycle‑life of 4/5A 2100mAh Ni‑MH battery?

≥500 cycles tested according to IEC61951‑2‑2017 standard under 0.2C charge‑discharge test conditions.

Q: What is internal resistance for this 4/5A Ni‑MH cell?

≤22mΩ when fully‑charged, measured under 1KHz AC condition.

Q: What discharge rate can 4/5A 2100mAh NiMH support?

Max continuous discharge current up to 4.2A (2C), suitable for medium high current pulse equipment.

Q: Can you spot‑weld tabs and build custom packs for 4/5A 2100mAh cells?

Yes, spot‑weld tabs, flying leads, connectors and series‑parallel OEM battery packs are supported.

Q: What export certificates are supplied for 4/5A Ni‑MH cells?

PPWR, CE, RoHS, REACH and MSDS documents can be provided for global export orders.

Q: Can I get test samples for 4/5A 2100mAh nickel metal hydride cell?

Samples are available for performance validation, buyer shall bear the shipping cost.

WEIJIANG original 4/5 A Ni-MH rechargeable cylindrical battery, rated capacity 2100mAh, nominal voltage 1.2V. Compact cylindrical design with high energy density, suitable for industrial devices, consumer electronics and custom battery pack assembly.

Featuring low internal resistance, stable discharge platform and long charge-discharge cycle life, it delivers reliable power output for long-term use. Widely applied in industrial equipment, backup power systems, portable electronic devices, power tools and smart home products.

All cells undergo strict capacity testing and quality inspection before delivery. We support OEM custom terminal design, capacity matching sorting, and bulk wholesale supply, with complete international safety certifications.

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Description

Full Technical Specifications (WJ‑4/5A2100)

Parameter Item	Specification
Model Number	WJ‑4/5A2100
Nominal Voltage	1.2V per cell
Rated Capacity	2100mAh (Minimum 2000mAh)
Cell Size	4/5A Cylindrical Ni‑MH
Dimension (D×H)	Φ17.0mm × 43.0mm
Weight	Approx 44g
Internal Resistance (1kHz, fully charged)	≤ 22 mΩ
IEC Cycle Life	≥500 cycles (IEC61951‑2:2017)
Max Continuous Discharge Current	4.2A (2C)
Standard Charge	210mA (0.1C), 16 hours
Fast Charge	1.05A with delta‑V charge‑termination control
Discharge Temperature Range	-20℃ ~ +60℃
Short‑term Storage Temperature (<30 days)	-20℃ ~ +60℃
Cut‑off Discharge Voltage	1.0V/cell
28‑day Self‑discharge Retention	≥65% capacity @20℃
Certifications	PPWR,CE, RoHS, REACH, MSDS documents available

Core Performance Advantages

≥500 IEC‑standard cycles: Pass IEC61951‑2‑2017 cycle test, stable long service life for industrial standby and power equipment.
4/5A Short A-size cylindrical cell: Standard A diameter, shorter height than full A cell, saves internal space for device assembly.
Ultra low internal resistance ≤22mΩ: Supports high continuous discharge up to 2C, great for pulse high-current loads.
Wide operating temperature: Discharge range from -20℃ up to +60℃, works reliably for outdoor and industrial devices.
Strict safety validation: Pass over‑charge, over‑discharge, short‑circuit, vibration and drop reliability testing.
Flexible OEM customization: Factory spot‑weld tabs, flying leads, connectors and series-parallel battery packs for industrial equipment.

Performance Characteristic Curves

1.0C Rate Charging Curves

4/5A 2100mAh Ni‑MH multi‑rate charging curves

0.1C‑1.0C Multi‑Rate Charging Curves

0.2C / 0.5C / 2C Discharging Curves

4/5A 2100mAh Ni‑MH storage & self‑discharge curves

Storage & Self‑Discharge Retention Curves

OEM Custom Battery‑Pack Service

We provide OEM & ODM custom assembly service based on WJ‑4/5A2100 Ni‑MH cells. We support series‑parallel combination, spot‑weld metal tabs, flying leads, connectors and custom plastic housings for industrial power equipment.

Custom 4/5A Ni‑MH battery pack manufacturing workflow

Typical Application Scenarios

4/5A 2100mAh nickel‑metal hydride cell is designed for industrial backup power, medical devices, emergency lights and portable equipment requiring medium high current output.

Industrial backup power supply Portable medical equipment Emergency lighting system Wireless power tools GPS tracking devices Solar garden light packs

Frequently Asked Questions

Q1: What is cycle‑life of 4/5A 2100mAh Ni‑MH battery?

A: ≥500 cycles tested according to IEC61951‑2‑2017 standard under 0.2C charge‑discharge test conditions.

Q2: What is internal resistance for this 4/5A Ni‑MH cell?

A: ≤22mΩ when fully‑charged, measured under 1KHz AC condition.

Q3: What discharge rate can 4/5A 2100mAh NiMH support?

A: Max continuous discharge current up to 4.2A (2C), suitable for medium high current pulse equipment.

Q4: Can you spot‑weld tabs and build custom packs for 4/5A 2100mAh cells?

A: Yes, spot‑weld tabs, flying leads, connectors and series‑parallel OEM battery packs are supported.

Q5: What export certificates are supplied for 4/5A Ni‑MH cells?

A: PPWR, CE, RoHS, REACH and MSDS documents can be provided for global export orders.

Q6: Can I get test samples for 4/5A 2100mAh nickel metal hydride cell?

A: Samples are available for performance validation, buyer shall bear the shipping cost.

Manufacturer & Certification Support

Weijiang Power is a professional Ni‑MH rechargeable battery manufacturer with 16‑year production experience. In‑house reliability laboratory and automated production lines support mass‑volume orders and OEM customization. Full export‑ready certification documents for worldwide customers.

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