6.4V 1800mAh Rechargeable LiFePO₄ 18650 Battery Pack – High Safety & Long Cycle Life

Cell Model: LiFePO₄ 18650
Nominal Capacity: 1800 mAh
Nominal Voltage: 6.4 V
Charge Cut-off Voltage: 7.3 V
Discharge Cut-off Voltage: 4.0 V
Cycle Life: ≥ 2 000 cycles (≥ 80 % capacity retention)
Charge Operating Temperature: 0 °C – 55 °C
Discharge Operating Temperature: –20 °C – 70 °C
Dimension: 37.2 ± 0.2 mm × 66.5 ± 0.5 mm × 21.2 ± 0.2 mm
Weight: Approx. 93 g
Note: Accept customization

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Product Description

The rechargeable LiFePO₄ 18650 1800mAh 6.4V battery pack is composed of high-quality lithium iron phosphate cells, offering high safety, long cycle life, and excellent temperature stability. It provides stable voltage output and high energy efficiency. Compared with traditional lithium-ion batteries, LiFePO₄ chemistry ensures higher safety, longer service life, making them an ideal choice for emergency lighting batteries.

Technical Specifications

Parameter	Specification
Cell Type	LiFePO₄ 18650
Nominal Capacity	1800 mAh
Nominal Voltage	6.4 V
Internal Resistance	≤ 130 mΩ
Charge Cut-off Voltage	7.3 V
Discharge Cut-off Voltage	4.0 V
Standard Charge Current	0.2 C (360 mA)
Maximum Charge Current	0.5 C (900 mA)
Standard Discharge Current	0.5 C (900 mA)
Max Continuous Discharge Current	1 C (1800 mA)
Charging Temperature	0 °C – 55 °C
Discharging Temperature	–20 °C – 70 °C
Cycle Life	≥ 2 000 cycles @ 80 % capacity retention
Weight	≈ 93 g
Dimensions	37.2 ± 0.2 mm × 66.5 ± 0.5 mm × 21.2 ± 0.2 mm
Note	Accept customization

Key Advantages

1. High Safety

The LiFePO₄ chemistry offers exceptional thermal and chemical stability. Its olivine structure inherently minimizes thermal runaway risk, making it resistant to fire or explosion. The battery pack typically includes protection circuits (or BMS) for protection against overcharge, over-discharge, and short circuits, offering safety superior to some other lithium-ion batteries.

2. Long Cycle Life

High-quality LiFePO₄ batteries offer a very long cycle life. Well-maintained cells can achieve over 2,000 cycles (to 80% of initial capacity). This translates to over 4 years of service with one cycle per day, making them cost-effective in the long run.

3. Excellent Thermal Stability

These batteries perform well in a wide operating temperature range, functioning effectively in extreme temperatures from -20°C to 70°C without significant performance degradation.

4. Stable and reliable power output

This pack uses two 18650 cells in series to provide a nominal voltage of 6.4V, suitable for devices requiring higher voltage. Its low internal resistance supports stable and reliable power delivery. Individual 18650 cells also offer stable voltage output.

5. Environmental protection and ease of use

They are free of heavy metals like cobalt and lead, non-toxic and non-polluting, making them more environmentally friendly. They have no memory effect, allowing convenient recharging at any time without needing a full discharge.