Product Description
21700 Li-ion battery is a new type of lithium-ion battery, which has a size of 21mm diameter and 70mm length. Compared with 18650 lithium battery, 21700 lithium battery has higher energy density and longer service life, which can provide higher power output and more stable performance. 21700 lithium battery is widely used in electric tools, electric vehicles, energy storage systems and other fields, and is one of the future trends of lithium battery market. It should be noted that the use of lithium batteries should follow the correct use and charging methods to avoid over-discharging and over-charging to ensure the safety and stability of the battery.
Product Parameters
Nominal Specification
| Item |
Condition |
Specification |
| 1 Energy |
Std. charge / discharge |
Nominal 16.5Wh
Minimum 16.0Wh |
| 2 Nominal Voltage |
Average |
3.65V |
| 3 Standard Charge |
Constant current
Constant voltage
End current(Cut off) |
0.3C(1440mA)
4.2V
50mA |
| 4 Max. Charge Voltage |
4.2 ± 0.05V |
| 5 Max. Charge Current |
1.0 C (4500mA) |
| 6 Standard Discharge |
Constant current
End voltage(Cut off) |
0.2C(960mA)
2.5V |
| 7 Max. Discharge Current |
3.0C (14400MA) |
| 8 Weight |
Approx. |
Max. 60.0 g |
| 9 Operating Temperature |
Charge
Discharge |
0 ~ 45ºC
-20 ~ 60ºC |
| 10 Storage Temperature |
1 month
3 month
1 year |
-20 ~ 60ºC
-20 ~ 45ºC
-20 ~ 20ºC |
| 11.Initial AC Impedance |
Cell shall be measured at 1kHz after charge per |
≤ 20 mo, without PTC |
| 12.Initial Capacity |
Cells shall be charged pe |
≥ 4500 mAh |
| 13.Cycle Life |
Cells shall be charged and discharged per 4.1.3 400 cycles. |
≥ 80 % |
Cylindrical lithium-ion rechargeable cell
Model name: INR21700 4500MAH
Cell height : Max.21.04mm Diameter : Φ Max.70.mm
Original imported brand 18650 2500mah Basic parameters
Widely used in electric vehicles, mobile power sources, energy storage, and RVs
Detailed Photos
Certifications
Packaging & Shipping
Performance Specification
1. Standard Charge Unless otherwise specified, "Standard Charge" shall consist of charging at constant current of 0.5C. The cell shall then be charged at constant voltage of 4.20V while tapering the charge current. Charging shall be terminated when the charging current has tapered to 50mA. For test purposes, charging shall be performed at 23ºC ± 2ºC.
2. Standard Discharge "Standard Discharge" shall consist of discharging at a constant current of 0.2C to 2.50V. Discharging is to be performed at 23 ºC ± 2 ºC unless otherwise noted (such as capacity versus temperature).
3. High Drain rate Charge/discharge condition Cells shall be charged at constant current of 1,500mA to 4.20V with end current of 100mA. Cells shall be discharged at constant current of 4,000mA to 2.50V. Cells are to rest 10 minutes after charge and 20 minutes after discharge.
Company Profile
Our Advantages
As a lithium battery company, our advantages are as follows:
1.High performance: Our lithium batteries have high performance features such as high energy density, high safety and high charge/discharge efficiency, which can provide users with more reliable, safe and long-lasting battery products.
2.Diversified products: Our lithium battery products cover a wide range of fields, including mobile devices, power tools, electric vehicles, energy reserves, etc., which can meet the needs of users in different industries and fields.
3.Innovative technology: We have an excellent R&D team, which constantly conducts technical innovation and R&D to promote the continuous upgrading and development of lithium battery technology.
4.Customer service: We are committed to providing customers with a full range of services, including product customization, technical support, and after-sales service, to meet their needs and requirements.
5.Sustainable development: We focus on corporate social responsibility and sustainable development, actively promote the development of green energy and environmental protection industry, and contribute to society and the environment.
FAQ
1. Q:Where can I get the price?
A: We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us in your email so that we'll regard your inquiry priority.
2. Q: How can I get a sample to check your quality?
A: After price confirmation, you can require some samples to check our quality.
3. Q: What about the lead time for mass production?
A: Honestly, it depends on your order quantity and the season you place the order. We suggested t hat you start inquiry two months before the date you would like to get the products at your country.
4. Q: What is your terms of payment?
A: We accept T/T and L/C. More battery model please contact us, and send us inquiry below.Looking forward to your inquiry soon and thanks for your viewing.
Caution Warning
* When using the application equipped with the battery, refer to the user's manual before usage.
* Please read the specific charger manual before charging.
* Charge time should not be longer than specified in the manual.
* When the cell is not charged after long exposure to the charger, discontinue charging.
* Battery must be charged at operating temperature range 0 ~ 45ºC.
* Battery must be discharged at operating temperature range -20 ~ 60ºC.
* Please check the positive(+) and negative(-) direction before packing.
* When a lead plate or wire is connected to the cell for packing, check out insulation not to short-circuit.
* Battery must be stored separately.
* Battery must be stored in a dry area with low temperature for long-term storage.
* Do not place the battery in direct sunlight or heat.
* Do not use the battery in high static energy environment where the protection device can be damaged.
* When rust or smell is detected on first use, please return the product to the seller immediately.
* The battery must be away from children or pets
* When cell life span shortens after long usage, please exchange to new cells.
* Do not use different charger. Do not use jacks (in cars) for charging.
* Do not charge with constant current more than maximum charge current.
* Do not disassemble or reconstruct the battery.
* Do not throw or cause impact.
* Do not pierce a hole in the battery with sharp things. (such as nail, knife, pencil, drill)
* Do not use with other batteries or cells.
* Do not solder on battery directly.
* Do not press the battery with overload in manufacturing process, especially ultrasonic welding.
* Do not use old and new cells together for packing.
* Do not expose the battery to high heat. (such as fire)
* Do not put the battery into a microwave or high pressure container.
* Do not use the battery reversed.
* Do not connect positive(+) and negative(-) with conductive materials (such as metal, wire)
* Do not allow the battery to be immerged in or wetted with water or sea-water
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