the HW-586 Battery Capacity Tester is a precision instrument designed to measure the true "health" and energy storage of various batteries. At Electrapac, we recommend this module for anyone who wants to verify the actual mAh (milliampere-hour) rating of their 18650 lithium-ion, Ni-MH, or Lead-Acid batteries.

Product Overview

The HW-586 is a digital discharge meter that tests battery capacity by applying a controlled load through external resistors. It monitors the battery voltage in real-time and automatically stops the test once a pre-set "termination voltage" is reached. This prevents over-discharging while providing an accurate calculation of the battery's total capacity in Ah or mAh.

Key Features for Electrapac Customers

• Verification Tool: Perfect for spotting "fake" high-capacity batteries that don't live up to their labels.

• Support for Multiple Chemistry: Test everything from a single 1.2V Ni-MH cell to a 12V Lead-Acid battery.

• Real-Time Data: The LED display cycles through three critical values during the test: Current (A), Voltage (V), and Capacity (Ah/mAh).

• Auto-Recognition: The smart firmware can automatically suggest a safe termination voltage based on the battery it detects.

• Error Code Protection: Includes built-in safety codes (Err1–Err4) to alert you if the battery voltage is too high, the load is incorrectly wired, or the battery is too weak.

How to Run a Test

To get an accurate reading using your Electrapac tester, follow these steps:

1. Preparation: Fully charge the battery you wish to test.

2. Connection: Connect the battery to the "Positive" and "Negative" terminals. Connect the provided load resistors to the "R" terminals.

3. Power: Plug in a Micro USB cable (5V) to power the board.

4. Set Termination: Press the "+" or "-" buttons to set the voltage at which the test should stop (e.g., 3.0V for a standard 18650).

5. Start: Press the "OK" button. The display will begin flashing the data as it discharges the battery through the resistors.

6. Finish: When the test is done, the display will stop flashing and show the final capacity in mAh.

Primary Applications

• 18650 Harvesting: Sorting healthy cells from old laptop batteries for DIY power walls.

• Quality Control: Checking that new bulk battery shipments meet their rated specifications.

• Lead-Acid Testing: Checking the health of UPS or small vehicle batteries.

• Circuit Troubleshooting: Identifying high-resistance batteries that cause voltage sag under load.

• Educational Labs: Teaching students about the relationship between voltage, current, and energy over time.

Why Shop at Electrapac?

We source the HW-586 with high-tolerance resistors to ensure your capacity readings are consistent and reliable. At www.electrapac.com, we provide the diagnostic tools that help you build better, safer, and more efficient power systems.