BAK 4S 14.8V 40000mAh (40Ah) 4S8P 3C Lithium-Ion Rechargeable Battery Pack

Description

BAK 4S 14.8V 40000mAh (40Ah) 4S8P 3C Lithium-Ion Rechargeable Battery Pack

The BAK 4S 14.8V 40000mAh (40Ah) 4S8P 3C Lithium-Ion Rechargeable Battery Pack is a high-capacity NMC Lithium-Ion battery pack designed for applications requiring reliable 14.8V power, higher capacity and extended runtime.

Built using BAK 3.7V 5000mAh lithium-ion cells, the pack is configured as 4S8P, providing 14.8V nominal voltage, 40Ah capacity, and approximately 592Wh energy.

With a 3C configuration, the theoretical discharge capability is 120A. Actual continuous discharge depends on the selected cells, BMS, wiring, connectors, interconnections and thermal management.

Key Features

• Brand: BAK
• Battery Chemistry: NMC Lithium-Ion
• Configuration: 4S8P
• Nominal Voltage: 14.8V
• Maximum Charging Voltage: 16.8V
• Capacity: 40000mAh (40Ah)
• Cell Capacity: 5000mAh
• Total Cells: 32
• Discharge Rating: 3C
• Theoretical 3C Current: 120A
• Rechargeable Lithium-Ion battery
• High-capacity design for extended operating time
• Suitable for portable, industrial and custom applications
• Custom BMS, connectors and wiring available

4S8P Battery Configuration

The pack contains 32 cells arranged as:

• 4 cells in series (4S) → 14.8V nominal
• 8 cells in parallel (8P) → 40Ah capacity
• Total cells: 4 × 8 = 32 cells
• Nominal energy: 14.8V × 40Ah = 592Wh
• Maximum charging voltage: 4.2V × 4 = 16.8V

3C Lithium-Ion Configuration

The theoretical 3C discharge current is:

40Ah × 3C = 120A

The actual usable continuous current should be determined by the complete battery design, including the BMS rating, cell specifications, wiring, connectors, interconnections 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 4S8P 14.8V 40Ah 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

• 40Ah high-capacity battery
• 14.8V nominal voltage
• Approximately 592Wh energy
• 4S8P cell configuration
• 3C discharge configuration
• Rechargeable NMC Lithium-Ion technology
• Extended operating time
• Custom BMS options available
• Custom connectors and wiring available
• Suitable for OEM and bulk requirements

Package Includes

• 1 × BAK 4S8P 14.8V 40000mAh Lithium-Ion Battery Pack
• BMS – according to selected configuration
• Connector and wiring – according to selected configuration