21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car

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21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car

Product Details:

Place of Origin:	guangzhou
Brand Name:	TAC
Certification:	CE\UN38.3\ROHS
Model Number:	20700

Payment & Shipping Terms:

Minimum Order Quantity:	5000pcs
Price:	usd 3-5
Packaging Details:	20pcs/ inner box , 5 box/ carton
Delivery Time:	10 word days
Supply Ability:	300000pcs /month

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Detailed Product Description

Material:	Lithium Ion Battery	Voltage:	3.7v
Capacity:	3000mah	Discharge Rate:	30C
Size:	D: 21mm H:70mm	PVC Color:	Blue
Circle Life:	500 Times	Current:	Max Discharge Current 30C

21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car

Feature for 21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car

new model 21700 similar with Tesla

high capacity 3000mah and high power support 30c discharge current

21700 / 20700 size

Period of Warranty

The period of warranty is one year from the date of shipment. We guarantees to give a ccin case of cells with defects proven due to manufacturing process instead of the customer abuse and misuse.

Storage of the Batteries

The batteries should be stored at room temperature, charged to about 30% to 50% of capacity.
We recommend that batteries be charged about once per half a year to prevent over discharge.

Other The Chemical Reaction

Because batteries utilize a chemical reaction, battery performance will deteriorate over time even if stored for a long period of time without being used. In addition, if the various usage conditions such as charge, discharge, ambient temperature, etc. are not maintained within the specified ranges the life expectancy of the battery may be shortened or the device in which the battery is used may be damaged by electrolyte leakage. If the batteries cannot maintain a charge for long periods of time, even when they are charged correctly, this may indicate it is time to change the battery.

Specification for 21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car

No.	Items	Specifications		Remark
1	Nominal Capacity	3000mAh		0.5C Standard discharge
2	Minimum Capacity	2800mAh		0.5C Standard discharge
3	Nominal Voltage	3.7V		Mean Operation Voltage
4	Delivery voltage	3.70~3.9V		Within 10 days from Factory
5	Charge Voltage	4.2V±0.03V		By standard charge method
6	Standard charging method	0.5C constant current,4.2V constant voltage charge to 4.2V,continue charging till current decline to ≤0.01C
7	Charge current	0.2C	600mA	Standard charge, charge time about 7h(Ref)
7	Charge current	0.5C	1500mA	Rapid Charge, charge time about: 3.5h(Ref)
8	Standard discharging method	0.5C constant current discharge to3.0V,
9	Cell Internal Impedance	≤35mΩ		Internal resistance measured at AC 1KH_Zafter 50% charge

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Rated Capacity at 0.5C(Min.)

After standard charge, the capacity shall be
measured on 0.5C discharge till the voltage,discharge to2.75V, the capacity is ≥2800mAh

Cycle Life:

Charging and discharging battery as blew
conditions 0.5C standard charge to 4.2V end-off1C standard discharge to 2.75V cut-off Continuous charge and discharge for 500cycles ,the capacity will be measure after the 500th cycle

Capacity retention

The battery to be charge in accordance with standard charge condition at 20~25℃,then storage
the battery at an ambient temperature 20~25℃ for 28 days.
Measure the capacity after 28 days with 0.2C at 20~25℃ as retention capacityThe battery to be charge in accordance with standard charge condition at 20~25℃,then storage battery at an ambient temperature 20~25℃ for 28 days.
Measure the capacity after 28 days with 0.2C at 20~25℃ as retention capacity the Retention capacity

should be over 80%

Battery Photos

21700 Lithium Battery 3.7V 3000MAH 30C High Power for EV E-Car