18650 Li-Ion Battery Capacity Tester 1-Channel Type-C Auto Charge Discharge

This 1-channel 18650 capacity tester measures a lithium-ion cell’s true capacity, internal resistance and energy by running it through an automatic charge/discharge cycle, and reports the result on a built-in digital display.

Key features

• Two 18650 holders: one holds an external cell to power the board, the other holds the cell under test.
• AUTO, CHG (charge-only) and DSG (discharge-only) modes, with up to 9 automatic charge/discharge cycles in AUTO mode.
• Digital display shows real-time voltage, accumulated capacity (mAh) and energy (mWh) as the test runs.
• Dual USB Type-C ports: one supplies power to the board, the other is the external discharge interface.
• Measures internal resistance by the direct-current two-wire method, useful for screening cells before building packs.

Specifications

• Channels: 1
• Supported cell: 18650 Li-ion (3.7V nominal, 4.2V full charge)
• Discharge voltage window: 2.5V–3.5V
• Charge/discharge current: approx. 1 A max
• Cell holder: suits flat-top 18650 cells
• Power input: 5V DC via USB Type-C
• Not included: cells and USB power cable

Not suitable for LiFePO4 cells, and the Type-C power input needs a standard charger rather than a fast-charge or high-power PD supply — use the tester to match cell capacities and internal resistance before assembling multi-cell radio, goggle or long-range flight packs.