ZB2L3 Digital Battery Capacity Tester 15V 3A

Battery Capacity Discharge Tester for Li-ion, 18650 and Rechargeable Batteries

The ZB2L3 is a digital battery capacity tester designed to measure the actual capacity of rechargeable batteries through a controlled discharge process. It measures and displays the discharged capacity in Ah (ampere-hours), while also monitoring the instantaneous discharge current and battery voltage.

The tester operates with an external load resistor connected to the module's output terminals. During the test, the ZB2L3 monitors the battery voltage and discharge current, accumulates the discharged capacity and automatically stops the discharge process when the preset termination voltage is reached.

The module features an LED digital display and three control buttons: OK, + and −. The termination voltage can be selected automatically according to the battery's initial voltage or adjusted manually. During operation, the display cycles through the measured capacity, discharge current and current battery voltage.

Main Features:

• Model: ZB2L3

• Type: Digital battery discharge capacity tester

• Measured voltage range: 1.00–15.00V

• Voltage resolution: 0.01V

• Maximum discharge current: 3.000A

• Current resolution: 0.001A

• Termination voltage adjustment range: 0.5–11.0V

• Measurable capacity: up to 9999Ah

• Module power supply: 4.5–6V DC via Micro USB

• Module operating current: less than 70mA

• Voltage measurement error: up to ±(1% + 0.02V)

• Current measurement error: up to ±(1.5% + 0.008A)

• PCB dimensions: approximately 50 × 37 × 17mm

Operating Instructions:

1. Fully charge the battery before starting the test.

2. Connect the battery to the input terminals, observing the correct polarity.

3. Connect a suitable external load resistor to the tester's output terminals.

4. Supply power to the module through the Micro USB interface (4.5–6V DC).

5. Press the OK button to start the test. The device automatically determines a suitable termination voltage or allows manual adjustment using the + and − buttons.

6. During discharge, the display cycles through capacity, current and voltage readings.

7. When the battery reaches the preset termination voltage, the tester automatically disconnects the load and displays the measured capacity.

Applications:

• Measuring the actual capacity of Li-ion batteries

• Testing 18650 battery cells

• Checking rechargeable batteries and battery packs within the supported range

• Capacity testing of NiMH and lead-acid batteries

• Comparing the condition of different batteries

• Testing batteries after repair or refurbishment

• Electronics laboratories and DIY projects

Important: The ZB2L3 is a discharge capacity tester, not a battery charger. The module does not provide its own discharge load, so an external load resistor is required. The maximum supported current is 3A, but the actual discharge current depends on the battery voltage and connected load. Reversing the input polarity may damage the circuit.