
36650 25.2V 70Ah LiFePO4 Battery Pack
This lithium battery is designed for air purifiers used in residential and commercial environments. It delivers stable high-capacity output with durable aluminum housing, ensuring continuous filtration and reliable long-term operation in compact device structures.
Electrical Specifications
| Attribute | Parameter |
|---|---|
| Product Number | 05DQ0057-01 |
| Cell Model | 26650-3400mAh-3.2V |
| Battery Configuration | 26650-8S21P |
| Nominal Voltage | 25.6V |
| Nominal Capacity | 70Ah |
| Rated Energy | 1792Wh |
| Charging Voltage | 29.2V |
| Discharge Cut-off Voltage | 20V |
| Standard Charging Current | ≤20A |
| Standard Discharge Current | 13A |
| Internal Resistance | ≤300mΩ |
Mechanical & Environmental
| Attribute | Parameter |
|---|---|
| Charging Temperature | 0~45℃ |
| Discharge Temperature | -20~60℃ |
| Storage Temperature | -20~35℃ |
| Dimensions | 400×262×160mm |
| Weight | 16Kg |
| Output Type | Aviation connector |
| Battery Case | Aluminum alloy |
| Communication Protocol | RS485 / CAN (optional, 9600bps) |
| Protection System | Short-circuit / Overcharge / Overdischarge / Overcurrent protection |
Application Background
Project Challenges
Continuous operation required for 12–24 hours in purification scenarios
Sustained load from fan motor and sensing system causes power fluctuation risk
Frequent daily cycling demands stable cycle life performance
Large capacity requirement within limited enclosure space
Customized Battery Solution
25.6V high-capacity LiFePO4 platform: ensures stable and continuous power supply
Aluminum alloy housing: improves structural strength and installation reliability
Multi-protection BMS: overcharge, overdischarge, overcurrent, and short-circuit protection
Communication-enabled system: RS485/CAN optional for real-time monitoring and system integration
Application Results
Supports long-duration continuous purification operation (12–24h)
Improved output stability under continuous fan and sensor load
Enhanced safety and reliability in long-cycle daily operation
Extended service life with reduced maintenance frequency
We support flexible customization based on your project requirements, including:
- Voltage range: 3.2V – 72V
- Capacity range: 100mAh – 100Ah
- Electrical performance design: Charge/discharge parameters, C-rate, internal resistance, temperature performance
- Mechanical design: Appearance, dimensions, housing material, and integrated structural engineering
- BMS design: Battery protection, cell balancing, and communication protocols (SMBus / I2C / UART)












