Cylindrical 18650 Cell
BAK N18650CP
Cylindrical 18650 cell delivering 3.35 Ah capacity with 251 Wh/kg energy density and 6.5 A maximum discharge rate.
Overview
The BAK N18650CP is a high-energy lithium-ion cylindrical 18650 cell designed for applications that demand high energy density and extended runtime. Released in 2018 and with the manufacturer based in China, this cylindrical 18650 cell delivers 3.35 Ah capacity and 12.1 Wh of energy at a nominal voltage of 3.6 V, with a maximum continuous discharge capability of 6.5 A, making it well suited to energy-focused applications requiring extended runtime. Among the 18650 cylindrical cells in the About:Energy battery library, the BAK N18650CP ranks 21st of 109 for gravimetric energy density. Its 251 Wh/kg compares with a 18650 cylindrical median of 216 Wh/kg.
Key Features
Discharge rate: 6.5 A continuous (1.9 C)
Energy density: 251 Wh/kg
Power density: 487 W/kg
Applications: aviation, e-mobility, energy storage
Technical Specifications from the Manufacturer
Parameter
Manufacturer
BAK
Model
N18650CP
Type
Li-ion
Form factor
Cylindrical 18650
Country of origin
China
Release year
2018
Nominal voltage
3.6
Energy capacity [Wh]
12.06
Capacity [Ah]
3.35
Gravimetric energy density [Wh/kg]
251
Gravimetric power density [W/kg]
487
Max continuous discharge [A]
6.5
Volume [cm³]
17.5
Mass [g]
48
Positive electrode (cathode)
Negative electrode (anode)
Graphite
Value
Applications & Use‑Cases
The BAK N18650CP is well suited to the following applications due to its cylindrical 18650 form factor and high energy density performance.
Aviation: Requires high specific energy for extended flight duration, high power-to-weight ratio for climb performance, and reliable operation across wide temperature ranges at altitude.
E-Mobility: Requires balanced energy and power density for range and acceleration, high cycle life for daily use, and robust calendar life to ensure long-term reliability.
Energy Storage: Requires stable cycle life across deep discharge profiles, reliable calendar life under float conditions, and consistent capacity retention over extended deployment periods.
General Applications: Suitable for applications requiring reliable lithium-ion performance with proven cycle life, consistent capacity delivery, and operational safety across diverse use cases.
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Performance & Model Data
Below are modelled performance metrics for the BAK N18650CP across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access BAK N18650CP constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not N18650CP data.)
Constant Current Temperature
Access BAK N18650CP thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not N18650CP data.)
Pulse Power Behaviour
Access BAK N18650CP pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not N18650CP data.)
Dynamic Profile Response
Access BAK N18650CP mission profile simulations in Voltt to prove the pack holds up over a real duty cycle before you build it. (Chart shown is illustrative, not N18650CP data.)
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Case Studies
See how we helped McMurtry reduce cell evaluation time by 70% through data driven testing and modelling.
Motorsports
McMurtry Automotive: Faster cell evaluation
McMurtry Automotive used The Voltt and validated cell models to evaluate the transition from the Molicel P45B to P50B during early pack concept development.
Side by side modelling enabled rapid comparison of electrical and thermal behaviour, avoiding lengthy physical test campaigns. This approach reduced cell evaluation time by seven months, allowing the team to lock in cell selection and pack assumptions earlier while lowering technical risk and accelerating vehicle development.
Comparison with Related Cells
Compare the BAK N18650CP with similar Cylindrical 18650 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
BAK
BAK Battery is a Chinese lithium-ion cell manufacturer producing cylindrical and prismatic formats
BAK Battery was founded in 2001 and is headquartered in Shenzhen, with its principal cell plants in Zhengzhou and Fuzhou. The company produces cylindrical 18650 and 21700 cells alongside prismatic and polymer formats, using both nickel-based and lithium iron phosphate chemistries. Its cells supply electric vehicles, light electric mobility, power tools, consumer electronics and backup energy storage, giving it volume across several high-turnover segments. BAK is vertically integrated across materials, cell production and pack assembly, and also operates a battery recycling business. Its relevance rests on long-running mass production in the established cylindrical formats and a cost position built on scale rather than novel chemistry.
Frequently Asked Questions
What is the capacity and voltage of the BAK N18650CP?
The BAK N18650CP has a nominal capacity of 3.35 Ah and a nominal voltage of 3.6 V, providing 12.1 Wh of energy per cell.
What is the maximum continuous discharge capability of the BAK N18650CP?
The BAK N18650CP supports continuous discharge rates up to 6.5 A, delivering a power density of 487 W/kg.
How much does the BAK N18650CP weigh and what is its volume?
The cell has a mass of 48 g and a volume of 17.5 cm³.
In which industries is the BAK N18650CP commonly used?
The BAK N18650CP is used across aviation, e-mobility, energy storage, applications that demand high energy density and consistent performance over extended cycles.
How does the BAK N18650CP compare with the Molicel M35A?
Comparing the BAK N18650CP with the Molicel M35A: capacity 3.35 Ah against 3.4 Ah; maximum continuous discharge 6.5 A against 10 A; energy density 251 Wh/kg against 259 Wh/kg; mass 48 g against 48 g. Both datasheets can be compared side by side in The Voltt.
What chemistry and format is the BAK N18650CP?
The BAK N18650CP is a cylindrical 18650 cell with a Graphite anode. It has a nominal voltage of 3.6 V and a volume of 17.5 cm³. Its full datasheet is free to view in The Voltt.
