BT4-4CHN-18650 Li-Ion 18650 Battery Tester 4-Channel

Product detailed description

The BT4-4CHN-18650 tester is an advanced measuring device designed for testing and cycling up to four lithium-ion batteries simultaneously. Each channel operates independently, allowing parallel measurements without mutual interference. The device supports automatic charging, discharging, internal resistance measurement, and cyclic tests. Thanks to active cooling and overheating protection, it is ideal for laboratory and home use when checking the capacity, quality and service life of cells. Charging LiFePO₄ (lithium iron phosphate) batteries is not supported.

Specifications:

• Model: BT4-4CHN-18650
• Operating voltage: DC 5 V
• Power Interface: 2× Type-C
• Supported batteries: Li-ion cells with a discharge voltage of 2.5–3.5 V and a charging range of 2.8–4.2 V
• Number of Channels: 4 independent measuring channels for charging and discharging
• Internal Resistance Measurement: DC two-wire method
• Charging Function: automatic disconnection when fully charged
• Discharge Function: automatic stop after reaching limit conditions
• Automatic Modes: supports automatic charging/discharging and cycling 1–9 cycles (in automatic mode)
• Discharge Cut-off Voltage: 11 levels, selectable between 2.5–3.5 V
• Discharge current: max. approx. 1 A (not constant, cannot be changed)
• Charging voltage: 4.2 V (TP4056 chip control)
• Maximum charging current: approx. 1 A (automatic termination when the current drops below 0.1 A)
• Data retention after shutdown: only saves the set parameters, not the measurement data
• Protections: active fan cooling, overheating protection
• Supported system languages: Chinese, English
• Dimensions: 147 × 102 × 34 mm
• Weight: 210 g (including packaging)

Package contents:

• 1× BT4-4CHN-18650 tester

Note:

• The product is not a self-contained functional unit and may require professional assembly or handling.
• Photos are for illustrative purposes only and may differ slightly from the actual appearance of the product without changing its properties.