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

A compact 1-channel 18650 lithium-ion battery capacity tester designed to evaluate cell health, verify true capacity, and automate charge-discharge cycling for FPV radio transmitters, goggles cases, and custom Li-ion flight packs. Powered via a 5 V USB Type-C connection, the module automatically cycles individual cells through charging and discharging phases while logging accurate capacity and energy metrics.

Key features

• Three selectable operating modes: Automatic charge/discharge test cycle (AUTO), Charge-only (CHG), and Discharge-only (DSG).

• Digital LED readout displaying real-time battery terminal voltage (V), accumulated capacity (mAh), energy (mWh), and active mode status.

• Adjustable discharge termination voltage to protect 18650 cells against deep-discharge degradation during capacity benchmarking.

• Integrated single-cell spring holder accommodating standard flat-top and button-top 18650 lithium-ion cells.

Specifications

• Input Power: 5 V DC via USB Type-C

• Supported Cells: 18650 Lithium-ion (3.7 V nominal, 4.2 V full charge)

• Operating Modes: AUTO, CHG, DSG

• Display Parameters: Voltage (V), Capacity (mAh), Energy (mWh)

Ideal for FPV pilots screening salvaged or aged 18650 cells to match capacities and internal resistances before assembling multi-cell transmitter or long-range flight packs.