INR21700-40D 4000mAh Power

Joinsun INR21700-40D 4000mAh Power-Type 21700 Battery Lithium-ion Cells are UL, BIS, FCC, CE, RoHS, CCC (3C), and CB certified, suitable for electric scooters, 2-wheels or 3-wheels scooters, self-balancing scooters, electric motorcycles, E-Bikes, electric wheelchairs, power chair, electric tricycle cargo vehicles, electric rickshaws and trishaws, kids’ ride-on cars, power banks, portable power stations, solar lithium battery, and more.

SPECS
Model	INR21700-40D
Cathode Material	NCM (NMC)
Nominal Capacity	4Ah (4000mAh)
Nominal Voltage	3.6V
Max Charge Voltage	4.2V
Discharge Cut-off Voltage	2.75V
Charge Current	2A (0.5C)
Discharge Current	12A (3C) 20A (5C Pulse)
Nominal Energy	14.4Wh
Energy Density	595Wh/L 206Wh/kg
Internal Resistance (IR)	22mΩ ±3
Cycle Life	80% DoD (25°C): • ≥800 Cycles (Discharge: 12A / 3C) • ≥1000 Cycles (Discharge: 4A / 1C)
Diameter	21.7±0.15 mm
Height	70.8±0.2 mm
Weight	70±1g
Max Series & Parallel	20 Series (72V) Parallel: Per Need
Operating Temperature	Ambient: Charge: 0~45°C Discharge: -20~60°C Cell Surface: Charge: 0~50°C Discharge: -20~80°C
Charge Temperature & Actual Charge Capacity (Relative to Nominal Capacity)	0°C: 80% 5°C: 90% 25°C: 100% 45°C: 100% 50°C: 95%
Discharge Temperature & Actual Discharge Capacity (Relative to Nominal Capacity)	-20°C: 65% -10°C: 80% 0°C: 85% 25°C: 100% 45°C: 99% 60°C: 97%
Storage Temperature	1 Year: 0~25°C 3 Months: 0~45°C 1 Month: 0~60°C (Recovery ≥90% after storage)
Certifications	UL, FCC, CE, RoHS, EU Battery Regulation, IEC, CB, CCC, BSMI, BIS, PSE, MSDS, UN38.3
Best Uses	Electric Vehicle: Electric scooters, 2/3-wheel scooters, self-balancing scooters, electric motorcycles, E-Bikes, electric wheelchairs, electric tricycle cargo vehicles, electric rickshaws, kids’ ride-on cars High-Performance Energy Storage: Power banks, portable power stations, mobile power devices
OEM / ODM	Yes
Warranty	1 Year
Daily Production Capacity	250,000 Cells