18650 and 21700 Battery Capacity and Internal Resistance Tester Automatic Charge/Discharge Module

18650 and 21700 Battery Capacity and Internal Resistance Tester Automatic Charge/Discharge Module Electronic Load Tester DESCRIPTION Features: Supports reverse connection protection, effectively preventing equipment damage caused by incorrect battery installation, making it safer and more reliable to use. Four-channel independent design, each channel operates independently without interference, allowing simultaneous charging, discharging, capacity testing, or aging testing of four 21700 batteries. Adopts an ABS air-guided base with a 40*40mm large-sized fan for active and efficient heat dissipation, ensuring stable operation for extended periods. Accurate capacity measurement and reliable data, meeting the needs of high-precision battery performance evaluation. Supports Chinese and English interface switching, real-time display of test parameters, intuitive and convenient operation. Product Parameters: Device Power Supply (self-provided): Use two DC 5V 3A or higher adapters, powered via Type C. Test Object: Ternary lithium 21700 batteries; not suitable for charging lithium iron phosphate batteries. Charging Voltage: 4.2V non-adjustable, charging via onboard 4506 charging chip. Charging Current: Maximum 1A non-constant current, non-adjustable, 4056 controlled charging. Stop (Discharge) Voltage: 2.5-3.5V, 11 adjustable levels. Discharge Current: Maximum 1A non-constant current discharge, non-adjustable. Discharge Resistor: 6W 3Ω 9J wirewound resistor, modification not supported. Internal Resistance Measurement Method: DC two-wire method principle test, results for reference only. 21700 Battery Testing: No adapter required, direct testing of 21700 batteries. Cooling Method: 40*40mm fan active cooling. Reverse Connection Protection: Supported. Host Size: 147*102*33mm