LOMEDRETME XH-M239/XH-M240

LOMEDRETME XH-M239/XH-M240 18650 Lithium Battery Capacity Tester User Manual

Model: XH-M239 / XH-M240

1. Introduction

This manual provides detailed instructions for the safe and effective use of the LOMEDRETME XH-M239/XH-M240 18650 Lithium Battery Capacity Tester. This device is designed to measure the actual capacity (mAh/MWh) of 18650 lithium batteries through a controlled discharge process. Please read this manual thoroughly before operation.

2. Safety Information

  • Always use the device in a well-ventilated area.
  • Ensure correct polarity when connecting batteries to prevent damage to the device or battery.
  • Do not short-circuit the battery terminals.
  • Keep the device away from moisture, dust, and extreme temperatures.
  • Do not attempt to disassemble or modify the device. Refer all servicing to qualified personnel.
  • Dispose of batteries responsibly according to local regulations.

3. Product Overview

The XH-M239/XH-M240 is an electronic load module designed for 18650 lithium battery capacity testing. It features a digital display for real-time data and control buttons for setting parameters and initiating tests.

LOMEDRETME XH-M239/XH-M240 18650 Lithium Battery Capacity Tester

Image 1: Front view of the XH-M239/XH-M240 Lithium Battery Capacity Tester, showing the display, control buttons, battery holders, and power input/output terminals.

Key Components:

  • 18650 Battery Holders: Slots for inserting 18650 lithium batteries.
  • Digital Display: Shows current capacity (mAh/MWh), voltage, and other test parameters.
  • Control Buttons: Used for navigation, setting parameters, and starting/stopping tests.
  • Power Input (DC 5-12V): Terminal for connecting external power supply to the tester.
  • Load Resistor: Integrated component for discharging the battery.
  • Battery Test Terminals: For connecting the battery to be tested.

4. Setup

  1. Connect Power Supply: Connect a DC 5-12V power supply to the "DC5-12V" input terminals on the tester. Ensure the power supply is stable and within the specified voltage range.
  2. Insert Battery: Carefully insert the 18650 lithium battery into the designated battery holder, observing correct polarity (+ and -).
  3. Connect Load (Optional): For external load testing, connect your desired load to the "BAT" terminals. Ensure the load is appropriate for the battery and tester specifications. For internal discharge, no external load connection is needed.
  4. Power On: Flip the ON/OFF switch to the "ON" position. The digital display should illuminate.

5. Operating Instructions

5.1 Setting Discharge Cut-off Voltage

  1. With the device powered on and a battery inserted, press the "终止电压" (Cut-off Voltage) button.
  2. Use the adjustment buttons (often labeled with arrows or +/-) to set the desired minimum discharge voltage. Common cut-off voltages for 18650 batteries are 2.8V or 3.0V. Refer to your battery's specifications.
  3. Press the "终止电压" button again to confirm the setting.

5.2 Starting a Capacity Test

  1. Ensure the battery is fully charged before starting the test for accurate capacity measurement.
  2. After setting the cut-off voltage, press the "启动/暂停/清零" (Start/Pause/Reset) button to begin the discharge process.
  3. The display will show real-time voltage, current, and accumulated capacity (mAh/MWh).
  4. The test will automatically stop when the battery voltage reaches the set cut-off voltage.
  5. The final measured capacity will be displayed.

5.3 Pausing and Resetting

  • To pause the test, press the "启动/暂停/清零" button once during discharge.
  • To resume, press the "启动/暂停/清零" button again.
  • To reset the accumulated capacity and prepare for a new test, press and hold the "启动/暂停/清零" button for a few seconds until the display clears.

5.4 Switching Display Modes (mAh/MWh)

Press the "Mah/Mwh" button to toggle between displaying capacity in milliampere-hours (mAh) and milliwatt-hours (MWh).

6. Maintenance

  • Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
  • Storage: Store the tester in a cool, dry place away from direct sunlight and corrosive materials when not in use.
  • Battery Care: Always remove batteries from the tester when not in use for extended periods.

7. Troubleshooting

ProblemPossible CauseSolution
Device does not power on.No power supply or incorrect voltage.Check power supply connection and ensure it is DC 5-12V. Verify ON/OFF switch position.
Test does not start.Battery not inserted correctly or cut-off voltage not set.Ensure battery polarity is correct. Set a valid cut-off voltage. Press the "Start" button.
Inaccurate capacity readings.Battery not fully charged before test, or incorrect cut-off voltage.Fully charge the battery before testing. Verify the cut-off voltage setting.

8. Specifications

  • Model: XH-M239 / XH-M240
  • Input Voltage: DC 5-12V
  • Battery Type: 18650 Lithium Battery
  • Capacity Measurement Range: 0-9999mAh / 0-9999MWh
  • Discharge Current: (Typically determined by integrated load resistor, specific value not provided)
  • Discharge Cut-off Voltage: Adjustable (specific range not provided)
  • Display: Digital LCD

9. Warranty and Support

LOMEDRETME products are designed for reliability and performance. While specific warranty details are not provided in this manual, LOMEDRETME offers customer support for any questions or concerns you may have regarding your product.

For assistance, please refer to the seller's contact information or visit the official LOMEDRETME website for support resources.

Note: The manufacturer reserves the right to make changes to product specifications and features without prior notice.

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