7.4V 4400mAh Lithium-ion Battery
Product Number:
01DQ0131-02
Nominal voltage:
7.4V
Nominal capacity:
4400mAh
Battery Configuration:
18650-2S2P
Dimension:
77×71×19.5mm
Application:
Pool Cleaning Robot
Custom Battery Design,Long Cycle Life,Reliable Performance
Product Overview
Electrical Specifications
| Parameter | Value |
| Battery Model | 01DQ0131-02 |
| Cell Type | 18650-2200mAh-3.7V |
| Battery Configuration | 18650-2S2P |
| Nominal Voltage | 7.4V |
| Nominal Capacity | 4400mAh |
| Rated Energy | 32.56Wh |
| Charging Voltage | 8.4V |
| Discharge Cut-off Voltage | 6.0V |
| Charging Current | 2.2A |
| Discharge Current | 4.0A |
| Internal Resistance | ≤150mΩ |
Mechanical & Environmental
| Attribute | Value |
| Charging Temperature | 0°C ~ 45°C |
| Discharge Temperature | -20°C ~ 60°C |
| Dimensions | 77×71×19.5mm |
| Weight | 210g |
| Material | Blue PVC package |
| Communication Protocol | SMBUS |
| Protection Rating | IP68 |
| Protection System | Short-circuit / Overcharge / Over-discharge / Overcurrent / Short Circuit / Temperature / ESD Protection |
Application Background
This battery solution is designed for pool cleaning robots, supporting underwater automatic cleaning and long-duration operation.
The robot must operate reliably in complex environments while continuously powering motors, suction, and filtration systems, requiring strong endurance, stable output, and compact integration.
Project Challenges
- Continuous operation of 2–4 hours required
- Fluctuating motor loads demand stable voltage output
- Frequent start-stop cycles require strong discharge performance
- Limited internal space imposes strict size and weight constraints
Customized Battery Solution
- 18650 2S2P configuration: delivers stable 7.4V / 4400mAh output with a compact structure
- Low internal resistance: reduces voltage fluctuation and ensures stable motor operation
- Compact design: optimized dimensions for easy integration
- Multiple protection system: includes overcharge, over-discharge, overcurrent, short circuit, and temperature protection
Application Results
- Supports 2–4 hours of continuous cleaning operation
- Stable output under varying loads improves system reliability
- Compact structure enhances device integration and portability
- Stable cycle performance extends service life
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)
Get a Custom Battery Solution
Tell us about your project needs. Our engineers will provide a tailored battery solution and quotation within 24 hours.
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