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1. General Specifications Battery Model: 21700 Lithium Ion Nominal Voltage: 3.7V Nominal Capacity: 4000mAh (4Ah) (at 0.2C Discharge) Internal Resistance: ≤15mΩ (Measured at 1kHz AC) 2. Charging Specifications Standard Charging Current: 0.5C (2A) Fast Charging Current: 2C (8A) Charging Voltage: 4.2V Charge Method: CC-CV (Constant Current-Constant Voltage) Charging Time: ~2.5-3 Hours (Standard Charge) 3. Discharge Specifications…
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The 21700 battery is a rechargeable lithium ion cylinder cell defined by diameter 21mm and length 70mm. The 21700 may be a fast-growing battery size as modern flashlights and other high-drain devices require increased battery capacities for extended runtimes. they’re available with button-top or flat-top terminals, and should feature built-in USB ports for direct…
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21700 3000mAh Product Specification Model: 21700 Rated capacity: 3000mAh Energy: 11.1Wh Minimum Capacity: 2950mAh Rated voltage: 3.7V Discharge Cut-off Voltage: 2.75V Charge Cut-off Voltage: 4.2V Cycle Life: More than 500 cycles Dimensions: Φ21*70mm Weight: 63g Internal Resistance: Less than 18mΩ Standard Discharge Current: 0.2C (600mA) Standard Charge Current: 0.2C (600mA) Max Continuous Discharge Rate: 15C…
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Main Features 1. High Energy Density Larger Capacity: Typically 3.7V 5000mAh, offering longer runtime compared to 18650 batteries. Higher Energy-to-Volume Ratio: Delivers more power in a compact form, making it ideal for high-energy applications. 2. Extended Cycle Life Made with high-quality lithium-ion materials, achieving 800 charge cycles for enhanced durability. Low internal resistance, reducing heat…
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The 18650 & 21700 battery pack is suitable for electric bicycles, scooters, golf carts, electric wheelchairs and other vehicles. Voltage ranges from 12V to 108V, we have professional high voltage equipment to do discharge and charge test. What we need to evaluate battery pack? It is necessary to know is voltage, capacity, battery dimension,…
