USB Load Tester, DROK DC 3-21V Load Battery Tester, 35W 3A Portable USB Monitor, Intelligent Constant Current Electric Discharge Resistance Power Resistor Kit

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TECHNICAL PARAMETERS: Voltage Range: DC 3-21V (compatible with quick charging such as the Qualcomm QC2.0, 5V/9V/12V/20V, Qualcomm QC3.0, BC 1.2, MTK-PE and Apple 2.4A etc.) Current Range: 0-3A continuously adjustable (roughly adjust 0-3A by per 0.1A , precisely adjust by per 0.01A) Accumulative Capacitance Range: 0-99999mAH Accumulative Electric Energy Range: 0-999.99Wh Power Range: 0-35W( the continuous discharging power is less than 35W) Accumulative Time Counting: 0-1000h Voltage Testing Deviation: 0.01V Threshold of Smart Temperature Control: when the temperature﹥55℃(131℉), the fan would automatically work; when﹤45℃(113℉), the fan would automatically turn back off Detector of Smart Temperature Control: premium NTC thermistor Switching Regulator IC Frequency for Fan: 1.2MHZ Power Supply Indicator: blue light when powering on Fan Speed: 6000/min, 40×40×20mm Controlling Chip: constant current chip Radiator: 6063 aerospace aluminum radiator, 40×40×10mm Adjustment Potentiometer: durable metal potentiometer Discharging Power Tube: voltage-controlled low-impedance MOSFET (more stable constant current when is on high voltage, high temperature) Operating Temperature: ﹣10 ~﹢65℃ (14-149℉) Product Dimensions: 100mm×48mm×30mm Special Note: Because iPhone has updated its iOS system and Identify chip, this USB load can not work for iPhone series and its charging cable. WARM TIPS When operating a burn-in test discharging, the resistor would get hot, about at 80-85℃, so please note not to be hurt by the heat


  • NOT ONLY A LOAD, BUT ALSO A MULTIMETER: DROK load tester can continuously discharge at 35W for a long time. Besides, it is also a USB multimeter which can be used to real-time monitor the voltage, current, capacitance, electric energy, power, temperature, conductive time for smart phones, power banks, and USB charger/wall USB charger when they are discharging and aging.
  • DUAL ADJUSTMENT DESIGN: The battery monitor tolerates the widest voltage range (DC3-21V) and current range (0-3A). Our USB detector owns dual adjustment design (current coarse adjustment 0.1A & current trimming 0.01A) and intelligent temperature control, which can help you get more accurate testing result.
  • INTELLIGENT TEMPERATURE CONTROL: Our resistor set is equipped with large fan and high quality aluminum radiator, strong heat dissipating. Furthermore, the load resistor has intelligent temperature control, which can effective product the module from damaging.
  • MULTIPLE USB PORT: The feature-rich battery tester load has various USB ports (Mini USB data cable port, USB Type-C for reversed USB connection, Android data cable port, Single wiring terminal or aluminum battery power supply testing port). Suitable for detecting the quality of different USB chargers. Note: Apple iphone data cable port is not suitable.
  • EFFORTLESS OPERATION &INSTALLATION: One button achieve clearing or resetting data. You just need to plug the electronic load to the power bank, smart phone, chargers or other device which you need to discharge,(not suitable for iPhone and its charging cable) no need wiring, screws or other tools, super easy and simple installation.

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