This high-performance 7.4V 9000mAh (9Ah) 2S2P 21700 lithium-ion battery pack is designed to deliver consistent, long-lasting power for a wide range of portable electronics, robotics, DIY projects, and low-voltage devices. Built with premium Grade A 21700 cells in a 2S2P configuration, it balances capacity, stability, and safety to meet your power needs reliably.
Key Specifications
| Parameter |
Details |
| Nominal Voltage |
7.4V |
| Rated Capacity |
9000mAh (9Ah) |
| Configuration |
2S2P (2 Series, 2 Parallel) using 21700 cells |
| Rated Energy |
66.6Wh |
| Dimensions |
42mm × 42mm × 70.5mm |
| Connector |
Red JST 2-Pin Connector |
| Cell Type |
Grade A 21700 lithium-ion cells |
| Cycle Life |
Up to 500 full charge-discharge cycles |
| Protection |
Built-in BMS (Battery Management System) |
| Operating Temperature |
Charge: 0°C ~ 45°C; Discharge: -20°C ~ 60°C |
Key Features
✅
High Capacity for Extended Runtime
With a 9000mAh capacity, this battery pack provides extended power for your devices, reducing the need for frequent recharges and keeping your projects running longer.
✅
Stable 2S2P Configuration
The 2-series, 2-parallel cell setup ensures steady voltage output and improved discharge performance, even under moderate loads, preventing power drops during use.
✅
Built-In Safety BMS Protection
An integrated Battery Management System safeguards against:
- Overcharging
- Over-discharging
- Over-current
- Short-circuiting
- Overheating
This multi-layer protection enhances both safety and long-term battery health.
✅
Compact & Durable Build
Encased in a robust PVC heat-shrink shell, the pack is resistant to minor impacts and daily wear. Its compact dimensions (42x42x70.5mm) make it easy to integrate into most devices without taking up excessive space.
✅
Ready-to-Use JST Connector
Pre-fitted with a standard red JST 2-pin connector for plug-and-play installation, eliminating the need for complex wiring in compatible devices.
✅
Versatile Compatibility
Ideal for a wide range of 7.4V applications, including:
- Portable speakers and amplifiers
- LED lighting systems
- Robotics and Arduino projects
- Surveillance cameras
- Medical and portable electronic devices
- Small power tools
