XH-M239 18650 Battery Capacity Tester Module LCD Display

18650 Lithium Battery Capacity Tester Module – XH-M239 LCD Digital Display

Accurately measure the true capacity of your 18650 lithium batteries and other rechargeable cells with the XH-M239 Battery Capacity Tester Module. Featuring a clear LCD digital display, this compact tester module gives you precise mAh and mWh readings so you always know the real condition and remaining capacity of your batteries — no guesswork required.

Whether you're a hobbyist, electronics enthusiast, or working on DIY projects, this module is an essential tool for verifying battery performance, sorting cells, and maintaining battery-powered devices.

Key Features

• High-Precision Measurement: Accuracy of ±1 mAh for reliable, true-capacity readings in mAh and mWh
• Clear LCD Display: Easy-to-read digital screen shows real-time capacity data at a glance
• Wide Voltage Compatibility: Supports supply voltage of DC 5V–12V or direct 18650 battery power
• Controlled Discharge Current: ~500 mA discharge current for consistent and repeatable testing
• Low Standby Current: Only 5 mA standby draw to conserve energy when idle
• Compact & Lightweight: Measures 111 × 97 × 25 mm and weighs just 93 g — easy to integrate into any workbench setup
• SMD Construction: Surface-mount components for durability and compact circuit design
• Dissipation Power: 10W / 8Ω for stable load testing

Technical Specifications

Who Is This For?

This tester module is perfect for electronics hobbyists, battery resellers, DIY makers, RC enthusiasts, and anyone who works with 18650 lithium cells or rechargeable battery packs. It's ideal for sorting used cells, validating new ones, or testing battery-powered builds.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What does the XH-M239 battery capacity tester module measure?

A: The XH-M239 measures the true capacity of 18650 lithium batteries and other compatible rechargeable cells in both mAh and mWh. With a measurement accuracy of ±1 mAh, it delivers precise, reliable readings via its built-in LCD digital display — ideal for verifying actual battery capacity versus rated capacity.

Q: What voltage does the XH-M239 tester module require?

A: The module supports a wide supply voltage range of DC 5V to 12V, and can also be powered directly by an 18650 battery, making it flexible and convenient for bench use or portable field testing.

Q: Is the XH-M239 difficult to set up and use?

A: Not at all. The XH-M239 is a ready-to-use SMD module. Simply connect your power supply (DC 5–12V or 18650 battery), attach the battery under test, and the LCD will display the discharge capacity in real time. No complex configuration is needed, making it accessible for beginners and experienced electronics users alike.

Q: Can this module test batteries other than 18650 cells?

A: Yes. While optimized for 18650 lithium cells, the XH-M239 can test other rechargeable battery types as long as they fall within the supported voltage and current parameters. Always verify compatibility with your specific battery type before testing.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.