Yeeco 35W USB Battery Load Tester Board, DC 3-21V 3A Adjustable Constant Current Electric Power Discharge Resistance for Voltage Current Monitor, Mobile Power Charger Tester, Discharging Aging

An industrial grade multi tester for testing; monitoring; identifying; discharging and aging
Operating Voltage: DC 3.5-21V(compatible with Qualcomm QC2.0 A/B protocol 5V/9V/12V/20V)
Constant Discharge Current: 0-3A continuously adjustable(coarsely adjust the metal knob within range 0-3A; the other knob for +/-0.2A current trimming)
Constant discharge power: 35W(Constant discharge current should less than 1A when voltage is 20V in order to avoid the discharge tube overload)
Intelligent temperature control: 45℃(the fan will work automatically when temperature is higher than 55℃ and stop when temperature is lower than 45℃)
Type of the intelligent temperature control detector: NTC high sensitivity thermistor
On/off switching frequency of the fan's chip DC-DC chip: 1.2MHz
Dual input interfaces' mode: USB input/ 3.5 pitch screw pressed wiring column
Power indicator: 0.96" LCD display
Rotating speed of the cooling fan: 2900/min

Product parameters:
Voltage testing range: 4-12V; Resolution accuracy: 0.01V
Current testing range: 0-5A; Resolution accuracy: 0.01A
Capacity accumulative range: 99999mAH; Resolution accuracy:0.001Ah
Energy accumulative range: 999999mWh; Resolution accuracy:0.001Wh
Power caculating range: 299.99W; Resolution accuracy: 0.001W
The maximum time reading: 999H 59M 59S; Resolution accuracy: 1second
Testing for: USB voltage; current; power; capacity; energy and time

Button usage:
Short press 1 time: switch the display showing;
Short press 5 times quickly for timing adjustment;
Short press 6 times quickly to change the English written into Chinese written, or change Chinese the written into English written

Package include:
1xUSB load tester