Description
BAK 2S 7.4V 25000mAh 2S5P 3C Lithium-Ion Battery Pack | Rechargeable NMC Battery
The BAK 2S 7.4V 25000mAh 2S5P 3C Lithium-Ion Battery Pack is a high-capacity rechargeable NMC lithium-ion battery pack designed for applications that require a compact 7.4V power source with high energy capacity and high discharge capability.
This battery uses BAK lithium-ion cells configured in 2S5P, providing a nominal voltage of 7.4V and a capacity of 25Ah (25,000mAh). With a 3C cell discharge capability, the theoretical maximum discharge current based on capacity is up to 75A, subject to the selected BMS, wiring, connectors, cell temperature, and operating conditions.
2S5P Configuration Explained
2S5P means:
- 2S = 2 cells/groups connected in series
- 5P = 5 cells connected in parallel in each series group
- Total cells = 2 × 5 = 10 cells
- Nominal voltage = 3.7V × 2 = 7.4V
- Capacity = 5 × 5Ah = 25Ah
- Maximum charging voltage = 4.2V × 2 = 8.4V
- Energy = 7.4V × 25Ah ≈ 185Wh
The parallel cells increase the available capacity and current capability, while the series connection increases the battery voltage.
3C High-Discharge Capability
The 3C rating indicates that the cells are designed for a high discharge rate.
For a 25Ah battery:
25Ah × 3C = 75A theoretical discharge current
The actual usable continuous current of the finished battery should be determined by the BMS rating, cell model, nickel/copper interconnects, wiring, connector, thermal conditions and pack design. A 75A figure should therefore not be treated as an automatic guaranteed pack output.
BMS Protection
A suitable 2S NMC BMS can provide protection against:
- Overcharge
- Over-discharge
- Over-current
- Short circuit
- Cell imbalance
- Excessive temperature, when temperature sensing is included
- Charge/discharge fault conditions
For high-current applications, the BMS should be selected according to the actual continuous and peak load requirements.
Charging
Use a charger specifically designed for a 2S NMC/Li-ion battery.
- Nominal battery voltage: 7.4V
- Full-charge voltage: 8.4V
- Charging method: CC/CV
- Recommended charger: 8.4V Li-ion charger
- Charger current should be selected according to the cells, BMS and required charging time.
Do not use a 12.6V 3S charger or a LiFePO4 charger for this battery.
Key Features
- Genuine BAK cell option
- 7.4V nominal output
- High 25Ah / 25,000mAh capacity
- 2S5P configuration
- NMC lithium-ion chemistry
- 3C high-discharge cell specification
- Approx. 185Wh energy
- Rechargeable design
- BMS protection
- Suitable for high-power applications
- Custom connector and wiring options
- Custom battery pack manufacturing available
Applications
This 7.4V 25Ah battery pack can be used for:
- Portable power systems
- Robotics
- AGV/AMR equipment
- Industrial electronics
- Communication equipment
- CCTV and security systems
- Backup power
- Portable instruments
- Electric equipment
- Mobility equipment
- RC and high-power projects
- Research and development equipment
- Custom electronic devices
- OEM equipment
Custom Battery Pack Manufacturing
Lion Battery can manufacture custom lithium-ion and LiFePO4 battery packs according to your voltage, capacity, current, dimensions and connector requirements.
Customization options include:
- Cell brand and model
- NMC or LiFePO4 chemistry
- Series/parallel configuration
- BMS rating
- Smart BMS
- Communication BMS
- Connector
- Wire length and gauge
- Nickel/copper interconnection
- PVC or rigid enclosure
- Protection and insulation
- Custom dimensions
- OEM/private-label requirements
