The ZB2L3 DC 4.5–6V 18650 Lithium Battery Capacity Tester is designed for accurately testing the capacity and performance of Li-ion and other rechargeable batteries. Operating with a micro USB power input, it measures discharge voltage (1.00–15.00V), termination voltage (0.5–11V), and discharge currents up to 3A. With high-resolution measurements (0.01V, 0.001A), the tester provides precise readings of battery capacity in Ah, current, and voltage, cycling through data during operation. The module automatically disconnects the battery when it reaches the termination voltage, preventing over-discharge. Compact and reliable, it is ideal for hobbyists, repair technicians, and battery pack builders needing accurate and repeatable battery capacity tests. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
Wide discharge voltage range: 1.00–15.00V (0.01V resolution).
Termination voltage adjustable from 0.5V–11V (0.1V precision).
Current measurement up to 3A (0.001A resolution).
High accuracy: ±1% voltage error, ±2% current error.
Displays capacity (Ah), voltage (V), and current (A) in cycles.
Includes 2 load resistors for controlled discharge testing.
Powered via micro USB (DC 4.5–6V).
Automatic cutoff when termination voltage is reached.
Error code system for voltage/current protection.
Compact, easy-to-use tester for Li-ion and rechargeable batteries.
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Applications:
Testing 18650 lithium-ion battery capacity.
Evaluating rechargeable batteries for DIY projects.
Battery pack development and analysis.
Educational demonstrations on battery discharge characteristics.
Maintenance and verification of batteries for electronics and robotics.
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| General Specifications |
| Product Type | Battery Capacity Tester |
| Model | ZB2L3 |
| Power Supply | DC 4.5–6V (Micro USB) |
| Discharge Voltage Range | 1.00–15.00V (0.01V resolution) |
| Termination Voltage | 0.5–11V (0.1V precision) |
| Max Current Range | 3.0A (0.001A resolution) |
| Voltage Error | ±1% + 0.3V |
| Current Error | ±2% ± 0.010A |
| Display Output | Capacity (Ah), Voltage (V), Current (A) |
| Error Codes | Err1–Err4 (voltage/current protection) |
| Load Resistors | 2 included |
| Shipment Weight | 0.0268 kg |
| Shipment Dimensions | 5 × 4 × 2 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
Instructions:
1. Fully charge the battery you’re testing.
2. Connect the battery under test to the input terminals (center terminals) in the proper manner. Connect the load resistor(s) to the proper (outer) terminals, and connect the micro USB power (use a standalone cell phone charger). The battery voltage will be displayed.
3. To start the test with the automatically determined termination voltage, press the “OK” button. The display will flash the termination voltage 3 times and begin testing. If you wish to set the termination voltage yourself, press “+” or “-” to modify the termination voltage as desired, then press “OK” to start the test.
4. The tester connects the battery to the load, and displays the capacity (Ah), discharge current (A), and battery voltage (V), cycling the display through each. When the battery voltage reaches the specified termination voltage, the battery is disconnected, and the display shows the capacity (Ah) with a rapid blinking to indicate the test is done. Press “OK” to solidly illuminate the display with the capacity, then press “OK” again to reset the unit for another test.
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Error Codes
Err1: Battery voltage greater than 15v.
Err2: The battery voltage is lower than the specified termination voltage.
Err3: The battery is unable to withstand the discharge current (too much sag?)
Err4: The discharge current is >3.1A.
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Package Includes:
1 x ZB2L3 DC4.5-6V 18650 Li-ion Lithium Battery Capacity Tester with 2 Resistor
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