18650 Li-Ion Cell Capacity Tester Analyzer XH-M240 with Display

Product description

A capacity tester for 18650 cells featuring simple operation and high functionality. The device can be powered from an external voltage source in the range of 5V to 12V or directly from an additional 18650 cell placed in the left holder of the module. The battery under test is placed in the right holder. The tester precisely displays measurement results in mAh and mWh, and also shows the current battery voltage. For easier operation, the board includes 4 control buttons and a power switch.

Key technical features

• Supply voltage: 5V - 12V (or one 18650 cell)
• Supported cell type: 18650
• Discharge current: 500mA
• Load: 10W, 8Ω
• Test units: mAh / mWh
• Module dimensions: 110mm x 80mm x 25mm

How it works

1. Connect the power supply and place the cell under test in the right holder. The current battery voltage will appear on the display.
2. Set the lower discharge voltage limit using the first and second buttons from the right (the default value is 3V).
3. Briefly press the first button from the left to start the discharge process.
4. Press the second button from the left to change the displayed range and measurement units.
5. After the discharge procedure is complete, the built-in LED display will start flashing.
6. A long press of the first button from the left resets the current measurement.

Example applications

• Checking the actual capacity of used recovered 18650 cells.
• Verifying the parameters of new batteries before building power packs.
• Diagnosing the degree of battery wear in power tools and flashlights.
• Selecting cells with similar parameters for safe series or parallel connection.
• Checking the technical condition of batteries used in electric scooters and e-bikes.

Benefits

• Ability to power the module independently from an external power supply or from an additional cell.
• A clear display for real-time monitoring of voltage and discharged capacity.
• Simple and very intuitive operation using the built-in tactile buttons.
• Accurate parameter measurement provided in two units: mAh and mWh.
• Compact dimensions that make storage, transport, and workspace organization easier.