4/5 AAA Ni-MH Rechargeable Battery 400mAh 1.2V Cylindrical Cell

Q: What is cycle‑life of 4/5AAA 400mAh Ni‑MH battery?

≥450 cycles tested according to IEC61951‑2‑2017 standard under 0.2C charge‑discharge test conditions.

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

≤75mΩ when fully‑charged, measured under 1KHz AC condition.

Q: Can you spot‑weld tabs and build custom packs for 4/5AAA 400mAh cells?

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

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

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

Q: Can I get test samples for 4/5AAA 400mAh nickel metal hydride cell?

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

WEIJIANG original 4/5 AAA Ni-MH rechargeable cylindrical battery, rated capacity 400mAh, nominal voltage 1.2V. Compact size with consistent performance, ideal for space-constrained electronic devices and battery pack assembly.

Featuring low internal resistance, stable discharge platform and over 500 charge-discharge cycles, it maintains reliable power for long-term standby use. Widely applied in miniature electronic instruments, memory backup systems, smart sensors and small medical devices.

All cells pass 100% quality testing before delivery. We provide 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‑4/5AAA400)

Parameter Item	Specification
Model Number	WJ‑4/5AAA400
Nominal Voltage	1.2V per cell
Rated Capacity	400mAh (Minimum 360mAh)
Cell Size	4/5AAA Cylindrical Ni‑MH
Dimension (D×H)	Φ10.5mm × 42.0mm
Weight	Approx 8.5g
Internal Resistance (1kHz, fully charged)	≤ 75 mΩ
IEC Cycle Life	≥450 cycles (IEC61951‑2:2017)
Max Continuous Discharge Current	400mA (1C)
Standard Charge	40mA (0.1C), 16 hours
Fast Charge	200mA‑400mA with delta‑V charge‑termination control
Discharge Temperature Range	-10℃ ~ +55℃
Short‑term Storage Temperature (<30 days)	-20℃ ~ +55℃
Cut‑off Discharge Voltage	1.0V/cell
28‑day Self‑discharge Retention	≥60% capacity @20℃
Certifications	PPWR,CE, RoHS, REACH, MSDS documents available

Core Performance Advantages

≥450 IEC‑standard cycles: Pass IEC61951‑2‑2017 cycle test for compact miniature standby electronic devices.
4/5AAA short‑length cylindrical cell: Slim AAA‑diameter with reduced height, perfect for space‑restricted compact equipment.
Controlled internal resistance ≤75mΩ: Reliable stable discharge for low‑current miniature portable hardware.
Wide operating temperature: Discharge range from‑10℃ up to +55℃, fit indoor compact sensors and household devices.
Strict safety validation: Pass over‑charge, over‑discharge, short‑circuit, vibration and drop reliability testing.
Compact OEM customization: Factory spot‑weld tabs, fine flying leads, tiny connectors for small‑sized custom battery packs.

Performance Characteristic Curves

1.0C Rate Charging Curves

4/5AAA 400mAh Ni‑MH multi‑rate charging curves

0.1C‑1.0C Multi‑Rate Charging Curves

0.2C / 0.5C / 1C Discharging Curves

4/5AAA 400mAh 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‑4/5AAA400 miniature Ni‑MH cells. We support series‑parallel combination, spot‑weld tiny metal tabs, thin flying leads, micro‑connectors and mini plastic housings for ultra‑compact device layout.

Custom 4/5AAA miniature Ni‑MH battery pack manufacturing workflow

Typical Application Scenarios

4/5AAA 400mAh miniature nickel‑metal hydride cell is designed for compact low‑power sensors, small household safety and mini portable electronic hardware.

Mini smoke alarm sensors Compact wireless remote controls Small portable medical gadgets Mini emergency indicator lights Micro wireless transmitters Tiny home appliance backup power

Frequently Asked Questions

Q1: What is cycle‑life of 4/5AAA 400mAh Ni‑MH battery?

A: ≥450 cycles tested according to IEC61951‑2‑2017 standard under 0.2C charge‑discharge test conditions.

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

A: ≤75mΩ when fully‑charged, measured under 1KHz AC condition.

Q3: Can you spot‑weld tabs and build custom packs for 4/5AAA 400mAh cells?

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

Q4: What export certificates are supplied for 4/5AAA Ni‑MH cells?

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

Q5: Can I get test samples for 4/5AAA 400mAh 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 small‑batch miniature OEM customization. Full export‑ready certification documents for worldwide customers.

View All Certifications > Factory & Testing Lab Showcase >

Need Quotation or Test Samples for 4/5AAA 400mAh Ni‑MH Battery?

Contact us for bulk price, spot‑welded cell options, miniature OEM pack solution and download official technical datasheet.

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