Shenzhen Blumoti Energy Co., Ltd. is a leading Chinese manufacturer and supplier of 4000mah 10c 21700 cylindrical battery. If you are looking to source durable, bulk 4000mah 10c 21700 cylindrical battery from China, feel free to contact our factory for details. Custom orders are welcome.
21700 Lithium-ion battery manufacturer | 5C/10C rechargeable 21700 batteries
The 21700 4000mAh lithium-ion cell supports 5C discharge, with a maximum discharge rate of up to 10C. At 5C, the discharge current reaches 20A, making it suitable for medium-power devices that require stable output and reliable runtime.
At 10C, the discharge current reaches 40A, making it ideal for high-current applications that need stronger burst power, such as wet/dry floor cleaners, vacuum cleaners, and other motor-driven devices. For 10C discharge 21700 cells, 4000mAh is typically the maximum available capacity, offering a strong balance between high-drain performance and energy capacity.
4000mah 21700 lithium-ion battery – General Specifications
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Cathode material: NCM.
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Nominal Voltage: 3.6V/3.7V
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Charging Voltage: 4.2V
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Discharge Cut-off Voltage: 2.75V
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Nominal Capacity: 4000mAh (0.2C discharge)
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Discharge Rate: 5C/10C
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Standard Charging Rate: 1C (Max. 2C)
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Cycle life: 500 cycles ≥ 80%
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Resistance: ≤15mΩ,For the internal resistance value of high-rate cells, please contact us.
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Weight : 68 ± 1g
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Protection Circuit: PCB/PCM, including overcharge, over-discharge, overcurrent, and short-circuit protection
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Operating Temperature: 0–45°C (charging); -20–60°C (discharging)
4000mah 21700 5C/10C Lithium-ion Battery Features
High-Drain Power Output
Supports 5C discharge, with up to 10C discharge available for high-current applications such as vacuum cleaners, floor washers, power tools, and motor-driven devices.
Stable Voltage Performance
Delivers steady power output with smooth voltage performance, helping devices run reliably under continuous load.
Custom Battery Pack Welding
Can be assembled into different series and parallel configurations according to voltage, capacity, and current requirements.
Flexible Pack Accessories
Compatible with suitable BMS/PCM, protection board, nickel strips, wires, NTC, and connectors such as JST, Molex, DC plug, XT30, XT60, or customized terminals.
Applications of 5C / 10C 4000mAh 21700 Battery
The 5C 21700 battery is suitable for medium-to-high power applications that require stable discharge, longer runtime, and reliable daily performance.
- Power Tools & Cleaning Devices
Commonly used for cordless drills, screwdrivers, small grinders, vacuum cleaners, sweeping robots, and garden tools. Typical pack designs include 5S1P, 6S1P, 6S2P, or 7S1P, supporting 18V, 21.6V, 22.2V, and 25.2V systems. A single cell supports up to about 20A continuous discharge.
- E-Mobility & Industrial Equipment
Suitable for electric scooters, e-bikes, AGV carts, electric sprayers, portable outdoor devices, and light industrial equipment. Common configurations include 10S2P for 36V packs and 13S2P for 48V packs, with stable current output for moderate-power motor systems.
The 10C 21700 battery is designed for high-drain applications that need stronger current output, better startup performance, and higher peak-load capability.
- High-Power Tools & Motor Devices
Ideal for electric saws, impact wrenches, angle grinders, high-power drills, electric pumps, and compact motor-driven equipment. Common pack designs include 5S1P, 5S2P, 7S1P, or 7S2P. A single cell supports up to about 40A continuous discharge.
- RC Models & Electric Drive Systems
Widely used in RC cars, drones, model boats, electric skateboards, balance scooters, and other high-current devices. Typical designs include 4S1P, 6S1P, 10S2P, or 13S2P, offering strong acceleration and stable power output.
- Custom High-Current Battery Packs
For 10C battery packs, we recommend wider pure nickel strips, multi-layer nickel strips, nickel-copper composite strips, or copper busbar welding. High-current silicone wires and connectors such as XT30, XT60, XT90, Anderson, JST, Molex, and DC plugs can be customized according to your device requirements.
FAQ
Q1: What is the discharge current of this 21700 4000mAh battery?
Q2: Can you customize the battery pack voltage and structure?
Q3: Can you provide BMS, wires, and connectors?
Q4: What applications is this battery suitable for?
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