1.What is an 18650 battery?
An 18650 battery is a cylindrical lithium-ion battery with a diameter of 18 millimeters and a length of 65 millimeters. It is a standard specification for lithium-ion batteries, named after its dimensions. Specifically, “18” represents the diameter of 18 millimeters, “65” represents the length of 65 millimeters, and “0” represents the cylindrical shape. Due to their excellent energy density, stability, and reliability, 18650 batteries are widely used in various electronic devices such as handheld electronic devices, laptops, power tools, electric vehicles, flashlights, etc. They are essential in industrial, commercial, and personal applications. Because of the standard size of 18650 batteries, many devices are designed to accommodate this battery specification. Additionally, there are many 18650 batteries available on the market with different capacities, chemical compositions, and performances to meet the needs of different devices.
2.What are the capacities of 18650 batteries?
18650 batteries are common lithium-ion batteries with capacities varying depending on the brand, model, and application. Generally, the capacity of 18650 batteries ranges from several hundred milliampere-hours (mAh) to several thousand mAh. Here are some common capacity ranges for 18650 batteries:
（1）Approximately 2000mAh to 2500mAh: This is the typical capacity range for many standard 18650 batteries. They are suitable for low-power devices and general applications.
（2）Approximately 2600mAh to 3000mAh: This is the capacity range for some high-performance 18650 batteries with higher energy density and longer usage time. They are suitable for higher-power devices and long-term use applications.
（3）Approximately 3100mAh to 3500mAh: This is the capacity range for some high-capacity 18650 batteries, commonly used in devices requiring longer usage time, such as flashlights, laptop batteries, etc.
（4）Over 3500mAh: Some new high-capacity 18650 batteries may exceed 3500mAh, providing longer usage time and higher energy density. These batteries are typically used in professional equipment with high battery life requirements.
3.What is a 1200mAh 18650 battery?
A 1200mAh 18650 battery is a lithium-ion battery with a capacity of 1200 milliampere-hours (mAh), typically used in various portable electronic devices and power tools. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 1200mAh 18650 battery means it can provide an energy capacity of 1200mAh. This implies that the battery can deliver a continuous discharge current of 1200mAh within one hour.
（2）Applications: This capacity of 18650 battery is suitable for many low to medium-power devices, such as handheld electronic devices (e.g., flashlights, wireless microphones), portable audio devices (e.g., Bluetooth speakers), wireless keyboards and mice, and some low-power small electronic products.
（3）Parameters:
Standard Voltage: 7.4V (2S)
Continuous Working Current: 1A
Charging Current: 0.5A
Charging Temperature: 0°C to 45°C
Discharging Temperature: -10°C to 60°C
Cut-off Voltage: 6V
Overcurrent Protection: 3~5A
Short Circuit Protection: Yes
Communication Method: None
Dimensions: 193855 (mm)
Capacity: 1200mAh
Applicable Types: Small Printers
Customizable options include voltage, model, casing, terminals, and wire length.
4.What is a 3200mAh 18650 battery?
A 3200mAh 18650 battery is a high-capacity lithium-ion battery with a large energy storage capacity. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 3200mAh 18650 battery means it can provide an energy capacity of 3200 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 3200mAh within one hour, providing longer usage time compared to low-capacity batteries.
（2）Applications: This high-capacity 18650 battery is suitable for many high-power devices, such as handheld power tools, high-brightness flashlights, electric bicycles, laptop batteries, etc., requiring significant energy support.
（3）Parameters:
Standard Voltage: 3.7V
Dimensions: 19*70 (mm)
Capacity: 3400mAh
Applicable Types: Electronic Products
Storage Temperature: -10°C to 45°C
Operating Temperature: -10°C to 60°C
Customization Support: Voltage, Model, Casing, Terminals, Cable Length
5.What is a 3350mAh 18650 battery?
A 3350mAh 18650 battery is a high-capacity lithium-ion battery with a large energy storage capacity. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 3350mAh 18650 battery means it can provide an energy capacity of 3350 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 3350mAh within one hour, providing longer usage time compared to low-capacity batteries.
（2）Applications: This high-capacity 18650 battery is suitable for many high-power devices, such as handheld power tools, high-brightness flashlights, electric bicycles, laptop batteries, etc., requiring significant energy support.
（3）Parameters:
Standard Voltage: 11.1V
Dimensions: 37*70 (mm)
Capacity: 3350mAh
Applicable Types: Electronic Products
Storage Temperature: -10℃-45℃
Operating Temperature: -10℃-60℃
Customizable options include voltage, model, casing, terminals, and wire length.
6.What is a 3500mAh 18650 battery?
A 3500mAh 18650 battery is a high-capacity lithium-ion battery with a large energy storage capacity. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 3500mAh 18650 battery means it can provide an energy capacity of 3500 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 3500mAh within one hour, providing longer usage time compared to low-capacity batteries.
（2）Applications: This high-capacity 18650 battery is suitable for various devices requiring large energy support, such as handheld power tools, high-brightness flashlights, portable audio systems, electric bicycles, etc. They are also commonly used in emergency lighting equipment for outdoor activities, camping, and emergencies.
（3）Parameters:
Standard Voltage: 7.4V
Dimensions: 213970 (mm)
Capacity: 3500mAh
Applicable Types: Electronic Products
Storage Temperature: -10°C to 45°C
Operating Temperature: -10°C to 60°C
Customizable options include voltage, model, casing, terminals, and wire length.
7.What is a 6000mAh 18650 battery?
A 6000mAh 18650 battery is an extremely high-capacity lithium-ion battery with a large energy storage capacity. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 6000mAh 18650 battery means it can provide an energy capacity of 6000 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 6000mAh within one hour, providing longer usage time compared to other specifications of 18650 batteries.
（2）Applications: This extremely high-capacity 18650 battery is suitable for high-power devices requiring significant energy support, such as high-intensity flashlights, high-power handheld power tools, large portable audio systems, etc. They can also be used in emergency lighting equipment or outdoor adventure activities in special scenarios.
（3）Parameters:
Standard Voltage: 3.7V
Dimensions: 193770 (mm)
Capacity: 6000mAh
Applicable Types: Electronic Products
Storage Temperature: -10℃-45℃
Operating Temperature: -10℃-60℃
Customizable options include voltage, model, casing, terminals, and wire length.
8.What is a 7500mAh 18650 battery?
A 7500mAh 18650 battery is a very high-capacity lithium-ion battery with a significant energy reserve. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 7500mAh 18650 battery means it can provide an energy capacity of 7500 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 7500mAh within one hour, providing an extremely long duration of power support compared to other specifications of 18650 batteries.
（2）Applications: This extremely high-capacity 18650 battery is suitable for devices with extremely high power demands, such as high-intensity flashlights, high-power handheld power tools, large portable audio systems, etc. They can also be used in emergency lighting equipment or long-term outdoor activities.
（3）Parameters:
Standard Voltage: 3.7V
Dimensions: 60*70 (mm)
Capacity: 7500mAh
Applicable Types: Shared bicycles, electric bicycles
Storage Temperature: -10℃-45℃
Operating Temperature: -10℃-60℃
Customizable options include voltage, model, casing, terminals, and wire length.
9.What is a 10400mAh 18650 battery?
A 10400mAh 18650 battery is an ultra-high-capacity lithium-ion battery with a massive energy reserve. Here is a brief introduction to this specification of 18650 battery:
（1）Capacity: A 10400mAh 18650 battery means it can provide an energy capacity of 10400 milliampere-hours (mAh). This implies that the battery can deliver a continuous discharge current of 10400mAh within one hour, providing an extremely long duration of power support compared to other specifications of 18650 batteries.
（2）Applications: This ultra-high-capacity 18650 battery is suitable for devices with extremely high power demands, such as high-intensity flashlights, high-power handheld power tools, large portable audio systems, etc. They can also be used in long-term outdoor activities, camping, or long-distance travel as backup power sources.
（3）Parameters:
Standard Voltage: 14.8V
Dimensions: Customized (mm)
Capacity: 10400mAh
Applicable Types: Specialized Laptop Computers, Supports -40°C Discharge
Storage Temperature: -10°C to 45°C
Operating Temperature: -40°C to 60°C
Customizable options include voltage, model, casing, terminals, and wire length.
10.Customizing the capacity of 18650 batteries
Customizing the capacity of 18650 batteries is a common requirement, especially for specific application scenarios or product designs. Here is the general process and considerations for customizing the capacity of 18650 batteries:
Needs Analysis: Firstly, an analysis of the required battery capacity needs to be conducted. This may involve factors such as how the battery will be used in the device, battery life requirements, charging and discharging rates, and the device’s power consumption.
Design Specifications: Based on the needs analysis, design specifications for the 18650 battery are formulated, including capacity, voltage, dimensions, and shape. Capacity is one of the most critical parameters and is usually specified in milliampere-hours (mAh).
Battery Customization: Collaborate with battery manufacturers to develop a production plan for customizing 18650 batteries. This may involve adjustments to the battery’s internal chemical composition, optimization of electrode design, and adjustments to production processes.
Sample Testing: After producing samples of the customized 18650 batteries, rigorous testing and verification are required to ensure that they meet design specifications and performance requirements. This includes capacity testing, cycle life testing, safety performance testing, etc.
Batch Production: After sample testing and verification, mass production can begin. During the production process, strict quality control measures are necessary to ensure that each battery meets design specifications and standards.
Quality Control: Implement rigorous quality control measures during the production process to ensure the stable and reliable quality and performance of each customized 18650 battery. This includes aspects such as raw material procurement, production process control, and finished product inspection.
After-Sales Service: Once customized 18650 batteries are deployed in the market, manufacturers need to provide timely after-sales service and support, addressing any issues customers encounter during use and continuously improving product performance and quality.
11.About Yungbang 18650 batteries
Yungbang was established in 2013, headquartered in Dongguan City, Guangdong Province, China. The company is a professional enterprise engaged in lithium battery production, with production bases in Dongguan and Jiangxi. The total factory area exceeds 18,000 square meters, with over 500 employees. As a national high-tech enterprise, we are committed to the research, design, production, and sales of lithium battery cells and packs.
Under normal circumstances, Yungbang provides free lithium battery design and sample services to meet various customer needs. However, for specially unique custom sample orders of lithium battery products, a certain fee may be charged, and we will communicate with customers in advance.
Yungbang’s factory is equipped with various product production quality assurance systems. We provide free quality inspection and also support third-party inspection agencies in sampling or comprehensive inspection of the products we produce.
Yungbang guarantees product quality. If any quality problems occur with the products we produce, we can provide free replacement or compensation.
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