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Professional 18650 Battery Tester – Full Analysis with Color Display
This 18650 battery tester provides an advanced solution for measuring capacity, internal resistance, and load behavior of rechargeable cells. Equipped with a 1.77-inch color screen, it displays real-time parameters: voltage, current, power, capacity, and resistance.
Main Features
- Two 18650 slots: One for powering the module, the other for testing.
- Discharge current: Selectable: 0.5A or 1A.
- Operating modes: Charge, discharge, cyclic test (automatic).
- Two USB Type-C ports: One for power, the other for external discharge.
- Load resistance: 10W – dissipates heat during testing.
- Measured capacity: 0 – 99999mAh and 0 – 99999mWh.
- Internal resistance: Measured automatically after connection.
- Easy to use: Physical ON/OFF button and intuitive menu.
Technical Specifications
| Power Supply | 5V DC via USB Type-C or 18650 cell |
|---|---|
| Supported Cell Type | 18650 (Li-ion) |
| Discharge Current | 0.5A or 1A (selectable) |
| Discharge Voltage | 3.0V (fixed) or adjustable 2.5–3.5V |
| Charging Current | 1A (max) |
| Power Port | USB Type-C |
| Internal Resistance | Approx. ±10% error margin |
| Display | 1.77″ color, real-time data |
Advanced Functions and Usage Modes
- Internal resistance measurement: Values are displayed automatically after cell connection.
- Test modes: Charge, discharge, and automatic cycle (repetitive charge-discharge).
- Cyclic test: Set number of cycles and discharge stop voltage.
- Volatile memory: Values reset when the module is powered off.
- LED indicators: Show charging status and test completion.
- Thermal protection: Discharge resistors heat up – ensure proper ventilation.
Operating Instructions
- Insert a battery into the test slot.
- Select the desired mode (charge, discharge, or automatic).
- Set parameters (current, stop voltage, cycles).
- Press “Start/Stop” to begin the test.
- Monitor the values displayed on the screen.
Ideal for electronics enthusiasts, technicians, or for verifying battery quality before use in DIY projects, power banks, or other devices.
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