Description
Power Pack 7.4V 4000mAh 2S2P 1C BMS 2A Lithium-Ion Rechargeable NMC Battery Pack
The Power Pack 7.4V 4000mAh 2S2P 1C BMS 2A Lithium-Ion Rechargeable NMC Battery Pack is a compact and reliable rechargeable battery solution designed for applications requiring a 7.4V nominal power supply with good capacity and runtime.
This battery pack uses 18650 NMC lithium-ion cells arranged in a 2S2P configuration, consisting of 2 cells connected in series and 2 cells connected in parallel in each group. The pack provides 4000mAh (4Ah) capacity and approximately 29.6Wh of energy.
An integrated 2S 2A BMS helps protect the battery during charging and discharging by providing protection against overcharge, over-discharge, over-current and short-circuit conditions.
Key Features
- Battery Chemistry: NMC Lithium-Ion
- Cell Type: 18650
- Configuration: 2S2P
- Nominal Voltage: 7.4V
- Maximum Charge Voltage: 8.4V
- Capacity: 4000mAh / 4Ah
- Energy Capacity: Approx. 29.6Wh
- Total Cells: 4
- Cell Capacity: 2000mAh
- Cell Discharge Rating: 1C
- Theoretical 1C Current: 4A
- BMS: 2S 2A
- Rechargeable lithium-ion battery
- Compact battery design
- Suitable for portable and electronic applications
- Custom wire and connector options available
2S2P Battery Configuration
The battery pack consists of 4 × 18650 NMC lithium-ion cells arranged in a 2S2P configuration.
- 2S: 2 cell groups connected in series
- 2P: 2 cells connected in parallel per group
- Total Cells: 2 × 2 = 4 cells
- Cell Capacity: 2000mAh
- Pack Capacity: 2 × 2000mAh = 4000mAh (4Ah)
- Nominal Voltage: 2 × 3.7V = 7.4V
- Maximum Charge Voltage: 2 × 4.2V = 8.4V
- Energy Capacity: 7.4V × 4Ah = 29.6Wh
1C Lithium-Ion Configuration
The pack capacity is 4Ah and the cell discharge rating is 1C.
Theoretical 1C Current = 4Ah × 1C = 4A
The 2A BMS rating is the BMS current specification and should not automatically be considered the cell’s continuous discharge capability. Actual usable current depends on the BMS, cells, wiring, connectors, interconnections and thermal conditions.
BMS Protection
The integrated 2S 2A BMS helps protect the battery against:
- Overcharge
- Over-discharge
- Over-current
- Short circuit
- Abnormal cell voltage conditions
Connector & Wire
Standard configuration:
- Connector: 5mm DC Jack / 2-Pin JST
- JST Cable Length: 54mm
- Standard Wire Length: 5cm
- Custom Wire Length: Available
Custom connectors and wire lengths can be supplied according to application requirements.
Applications
This 7.4V 4Ah battery pack is suitable for:
- Portable electronic equipment
- Robotics
- CCTV and security equipment
- LED lighting
- IoT devices
- Portable instruments
- DIY electronics
- Small backup power systems
- Monitoring equipment
- Custom OEM equipment
- Portable power applications
Advantages
- 4000mAh / 4Ah capacity
- 2S2P configuration
- Approx. 29.6Wh energy capacity
- 7.4V nominal voltage
- 8.4V maximum charging voltage
- Integrated 2S 2A BMS
- Rechargeable NMC lithium-ion technology
- Compact and practical design
- Custom connector and wire options available
- Suitable for OEM and customized applications
Package Includes
- 1 × 7.4V 4000mAh 2S2P NMC Lithium-Ion Battery Pack
- 1 × 2S 2A BMS
- 5mm DC Jack / 2-Pin JST connector
- 5cm standard wire
