BAK 4S 14.8V 20000mAh (20Ah) 4S4P 3C Lithium-Ion Rechargeable Battery Pack

Description

BAK 4S 14.8V 20000mAh (20Ah) 4S4P 3C Lithium-Ion Rechargeable Battery Pack

The BAK 4S 14.8V 20000mAh (20Ah) 4S4P 3C Lithium-Ion Rechargeable Battery Pack is a high-capacity NMC Lithium-Ion battery pack designed for applications requiring reliable 14.8V power and extended runtime.

Built using BAK 3.7V 5000mAh lithium-ion cells, the pack is configured as 4S4P, providing 14.8V nominal voltage, 20Ah capacity, and approximately 296Wh energy.

With a 3C configuration, the theoretical discharge capability is 60A. Actual continuous current depends on the selected cells, BMS, wiring, connectors, nickel/copper interconnections and thermal management.

 Key Features

• Brand: BAK
• Battery Chemistry: NMC Lithium-Ion
• Configuration: 4S4P
• Nominal Voltage: 14.8V
• Maximum Charging Voltage: 16.8V
• Capacity: 20000mAh (20Ah)
• Cell Capacity: 5000mAh
• Total Cells: 16
• Discharge Rating: 3C
• Theoretical 3C Current: 60A
• Rechargeable Lithium-Ion battery
• High-capacity design for longer operating time
• Suitable for custom battery pack applications
• BMS, connector and wiring options can be customized

4S4P Battery Configuration

The pack contains 16 cells arranged in a 4S4P configuration:

• 4 cells in series (4S) → 14.8V nominal
• 4 cells in parallel (4P) → 20Ah capacity
• Total cells: 4 × 4 = 16 cells
• Nominal energy: 14.8V × 20Ah = 296Wh
• Maximum charging voltage: 4.2V × 4 = 16.8V

3C Lithium-Ion Configuration

The theoretical 3C discharge current is:

20Ah × 3C = 60A

This is a theoretical calculation based on the stated 3C rating. The actual continuous discharge current should be limited by the complete battery system, especially the BMS, cells, wiring, connectors and thermal conditions.

BMS Protection

A suitable BMS can provide protection against:

• Overcharge
• Over-discharge
• Over-current
• Short circuit
• Cell imbalance
• Excessive temperature
• Abnormal charging and discharging conditions

The BMS current rating should be selected according to the actual load requirements of the application.

Applications

The BAK 4S4P 14.8V 20Ah battery pack can be used for:

• Portable Power Equipment
• Robotics
• RC Projects
• Electric Mobility Projects
• Small EV Applications
• Backup Power Systems
• DC Power Equipment
• Industrial Electronics
• Custom Battery Projects
• OEM Battery Applications

Advantages

• 20Ah high-capacity configuration
• 14.8V nominal voltage
• Approximately 296Wh energy
• 4S4P cell configuration
• 3C discharge configuration
• Rechargeable NMC Lithium-Ion technology
• Suitable for extended-runtime applications
• Custom BMS options available
• Custom connectors and wiring available
• Suitable for OEM and bulk battery requirements

 Package Includes

• 1 × BAK 4S4P 14.8V 20000mAh Lithium-Ion Battery Pack
• BMS – according to selected configuration
• Connector and wiring – according to selected configuration