ZB2L3 capacity meter for rechargeable batteries 18650 cell tester

ZB2L3 cell capacity tester

ZB2L3 tester is a precise tool for accurate assessment of rechargeable battery condition. The device is powered by a voltage in the range of 4.5V to 6V, supplied via a built-in micro USB port. It enables effective monitoring and diagnostics of cells in many electronic projects.

The module supports a wide capacity range, achieving a maximum measurement result of 9999Ah while maintaining high accuracy of 1%. The kit includes 2 resistors rated 7.5 Ohm and 5W, which allow a proper discharge and measurement process.

Key technical features

• Support for many cell types: Li-Ion, Ni-Mh, Ni-Cd, Li-Pol, Li-Fe, Pb
• Module power supply: 4.5V - 6V (micro USB port)
• Maximum voltage of battery under test: 15V
• Minimum voltage of battery under test: 0.5V
• Maximum measured capacity: 9999Ah

Example applications

• Verifying actual capacity of recovered 18650 cells
• Testing wear of battery packs in RC modelling
• Battery diagnostics in portable devices and power tools
• Checking condition of gel and lead-acid (Pb) batteries
• Selecting cells with similar parameters for building new power packs

Benefits

• High measurement precision thanks to 1% accuracy
• Versatile use with a wide range of popular rechargeable types
• Ready to use straight out of the box thanks to included load resistors
• Convenient power from a standard phone charger via micro USB
• Safe operation with clear error messages on the display

Specifications

• Power supply: 4.5 - 6V via micro USB
• Maximum voltage of cell under test: 15V
• Minimum voltage of cell under test: 0.5V
• Maximum cell capacity: 9999 Ah
• Included: 2x 7.5 Ohm, 5W resistors

Simplified operating instructions

1. Make sure the battery under test is fully charged.
2. Connect the battery to the tester: positive to IN(+), negative to IN(-). Warning: reversed connection will damage the module.
3. Connect the resistor included in the kit to the terminals marked R.
4. Connect the tester to power via the micro USB port.
5. Press and hold the OK button until the LED flashes 3 times. The tester will automatically select the discharge range and show the battery voltage.
6. During operation the display alternately shows current voltage, discharged mAh, and discharge current.
7. The device discharges the cell to the set voltage. With automatic selection the module sets a safe discharge threshold by itself.
8. When the process finishes, the display shows the actual capacity of the battery under test. Measurement takes as long as needed to discharge the cell.
9. The + and - buttons allow manual setting of the end-of-discharge voltage.

Note: Discharging a battery to too low a voltage can cause irreversible damage. Before manually setting the discharge voltage, read the specification for that cell.

Display error indications

• Err1: Battery voltage exceeds 15V
• Err2: Battery voltage is lower than 0.5V
• Err3: Battery does not allow loading or discharge current is too high
• Err4: Discharge current exceeds 3.1A