21700 Cylindrical Rechargeable Lithium-ion & LiFePO4 Battery Cells

Battery Cell

21700-3.7V-5500mAh

21700-3.7V-5000mAh

21700-3.2V-3500mAh (LiFePO4)

21700 cylindrical rechargeable cells for battery-pack integration. Standard-model sourcing and OEM/ODM available.

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Item	21700-5500mAh	21700-5000mAh	21700-3500mAh (LiFePO4)
Form	Cylindrical	Cylindrical	Cylindrical
Case Material	Nickel-plated steel	Nickel-plated steel	Nickel-plated steel
Diameter	21.7 +/- 0.3mm	21.7 +/- 0.3mm	21.7 +/- 0.3mm
Height	70.5 +/- 0.3mm	70.5 +/- 0.3mm	70.5 +/- 0.3mm
Weight	70g +/- 1	70g +/- 1	68.5g +/- 1
Nominal Capacity	5500mAh	5000mAh	3500mAh
Minimum Capacity	5400mAh	4900mAh	3400mAh
Nominal Voltage	3.7V	3.7V	3.2V
Charge Cut-off Voltage	4.2V	4.2V	3.65V
Discharge Cut-off Voltage	2.5V	2.5V	2.0V
Standard Charge Current	0.2C (1.1A)	0.2C (1A)	0.2C (0.7A)
Maximum Charge Current	1C (5.5A)	0.5C (2.5A)	1C (3.5A)
Standard Continuous Discharge Current	0.5C (2.75A)	0.5C (2.5A)	0.5C (1.75A)
Maximum Continuous Discharge Current	2C (11A)	2C (10A)	3C (10.5A)
Maximum Pulse Discharge Current (5s)	3C (16.5A)	3C (15A)	5C (17.5A)
AC Internal Resistance (1KHz)	<=23mOhm	<=23mOhm	<=23mOhm
Charge Temperature	0C to 45C	0C to 45C	0C to 45C
Discharge Temperature	-20C to 60C	-20C to 60C	-20C to 60C
Storage Temperature	-20C to 45C	-20C to 45C	-20C to 45C
Applications	Two-wheel vehicles, balance vehicles, skateboards, power tools, garden tools, vacuum cleaners, robot vacuums, outdoor power, smart home

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