18650 Battery & 21700 Battery
High capacity, long service life, low internal resistance, wide application
Promotion in Good Price
18650 2000mah ECO 3.7V: USD 0.55 PER PCS in Dec. 2023
- Nominal Capacity: 2080 – 2120 mAh
- Internal Resistance: 38 -43mΩ
- Voltage: 3.89 – 3.9 V
- Packing: 400pcs / carton
- G.W. : 19 kg / carton
18650 2000mah-10C 3.7V for Power Tool: USD 0.75 PER PCS in Dec. 2023
- Nominal Capacity: 2000 – 2025 mAh
- Internal Resistance: 13.5 -15.5mΩ
- Voltage: 3.632 – 3.636 V
- Packing: 400pcs / carton
- G.W. : 19 kg / carton
Why with us
Guangxi Donglai New Energy Technology Co. Ltd
1
Good quality & safety
modern facilities and R&D center assure the battery good and stable quality.
2
competitive price
good price directly obtain from the battery manufacturer
3
quick delivery
Grand production capacity and stock assure the quick delivery
Test Data
The battery is tested monthly.
The following is one part of the test result data for 2200mah, 300 cycle time
The life cycle data including:
Constant current charging_mAh，Constant current charging time_Sec， Constant voltage charging_mAh，
Constant voltage charging time_Sec， Total charge_mAh， Total discharge_mAh， Total discharge time_Sec，
Charge and discharge efficiency， Capacity decay rate
The original data will be sent on request.
18650 Lithium ion Battery
Quality Certificated and Safety Approved by Time ◆ Competitive in Price ◆ Delivery in Quick Time
21700 Lithium ion Battery
Brief Introduction
The number “18650” of the 18650 battery represent the size of battery. Among them, 18 is the diameter of 18mm, 65 is the length of 65mm, and 0 means the cylindrical battery.
The 18650 cylindrical battery produced by DLN Energy is a ternary lithium-ion NMC battery. The battery capacity is above 1000mAh. Common capacities are:
1500mah, 1800mah, 2000mAh, 2200mah, 2500mah, 3000mah
The following are the general technical parameters of a single 18650 battery:
Nominal voltage | 3.7V |
Max charge voltage | 4.2V |
Discharge cut-off voltage | 2.75V |
Diameter | ≤ 18.45mm |
Height | ≤ 65.30mm |
Weight | 45.5g |
To know more parameters, please visit: Bulk 18650 Battery
Ternary material
A battery’s energy density is critical when it comes to its size, how long it can power the electrical device, and even the battery safety.
Compared with traditional batteries, ternary lithium batteries have higher energy density and higher voltage. Therefore, for the two battery packs of the same weight, the ternary lithium battery one has a larger capacity.
01
Ternary materials refer to the three elements of nickel, cobalt, and manganese, named NMC in the industry.
The battery with nickel-cobalt-manganese ternary battery material as the positive electrode is safer than lithium cobalt oxide batteries.
03
In other words, more nickel means large battery capacity, more cobalt means long battery life, more manganese means good battery safety
Battery Assembly Process
A 18650 Li-ion battery is a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.
Li-ion batteries use an interlaced lithium compound as one electrode material, compared to the metallic lithium used in a non-rechargeable lithium battery. The electrolyte, which allows for ionic movement, and the two electrodes are the constituent components of a lithium-ion battery cell.
Cells with a cylindrical shape are made in a characteristic “swiss roll” manner, which means it is a single long sandwich of positive electrode, separator, negative electrode and separator rolled into a single spool.
The above text comes from Industryresearch.
Note: This process is mainly about the combination and assembly of various battery components.
For a more complete battery production process, please see: Battery Technological Process or contact us.
Advantages of 18650 NMC Battery
01 Large capacity
A battery’s energy density is critical when it comes to its size, how long it can power the electrical device, and even the battery safety.
Compared with traditional batteries, ternary lithium batteries have higher energy density and higher voltage. Therefore, for the two battery packs of the same weight, the ternary lithium battery one has a larger capacity.
02 Long life
The 18650 lithium battery has a very long service life. In normal use, the cycle life can reach more than 500 times, which is more than twice that of ordinary batteries.
03 High voltage
The voltage of 18650 lithium battery is generally 3.6V, 3.7V and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-metal hydride batteries.
04 High safety performance
RoHS trademark certified 18650 lithium battery has high safety performance:
- Non-explosive, non-flammable.
- Non-toxic, non-polluting.
- Various safety performances are completed in one go, and the number of cycles is greater than 500.
- High temperature resistance performance is good, and the discharge efficiency reaches 100% under the condition of 65℃.
- In order to prevent the short circuit of the battery, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the possibility of short circuit phenomenon has been reduced to the extreme.
- Generally, a protective board is installed to avoid overcharging and overdischarging of the battery, which can also prolong the service life of the battery.
05 No memory effect
It is not necessary to empty the remaining power before charging, which is convenient to use.
06 Small internal resistance
The internal resistance is smaller than that of ordinary liquid batteries. The internal resistance of batteries from DLN Energy can be less than 50mΩ, which can fully meet the international standards.
07 Wide range of applications
It can be combined in series or in parallel to form a 18650 lithium battery pack, forming a larger energy storage unit, which can be used in various fields.
Battery Application
Electronic products
Electric bicycle
Medical equipment
Electric scooter
Mobile lighting
Power tools
Power wall
UPS backup power supply
Solar street light
Photographic equipment