USB Resistor DC electronic load 2 switch adjustable current 5V 1A/2A/3A battery capacity voltage discharge resistance tester It is convenient to test whether the output current of mobile power charging banks, mobile phone chargers, USB power supplies, etc. meets the standard, as long as the USB is connected to it. And it is possible to conduct aging tests on mobile power supplies and USB power adapters. During the aging test, the resistance will burn during discharge, and the temperature is around 80-85 ℃. Please pay attention to preventing scalding. Kind reminder: When the load device is working, the winding resistance will inevitably generate a very, very high temperature due to the large current passing through it. Therefore, during use and in the short period of time after use, the human body should not come into contact with the golden metal heat dissipation part to avoid burns! Do not allow flammable items to come into contact with the tester to avoid a fire! In short, be highly vigilant during use! Considering the special nature of the heating resistor, after initial use and power on for a period of time, there will be an odor phenomenon, which is caused by the external paint being baked at high temperature and completely disappears after a period of use. This phenomenon is inevitable and is a normal situation. There is no need to worry about the load tester being damaged. Please rest assured to use it. 5V-1A-2A: 1. This product is a USB charging current detection load tester with toggle switch 2. Adopting a toggle switch and dual color work light, it can directly switch between 1A and 2A current discharge 3. When switching to 1A operation, the green light is on When switching to 2A operation, the red light is on 5. Large area copper coating, increasing heat dissipation holes 6. The back has expanded the copper clad area and added heat dissipation holes to enhance heat dissipation function 7. The real 5 ohm winding resistance is used, and the discharge resistance adopts a 5 ohm winding resistance 8. More accurate test results (closer to 2A and 1A) Instructions for use: When the power output reaches 1A, switch to 1A for testing When the power output is 2A or above, switch to 2A for testing 3. Judgment criteria: Insert the USB output port of the detected USB power supply/mobile power supply When 4.1A is working, the green light is on/when switching to 2A, the red light is on When discharging, the resistance will burn, and the temperature is around 80 to 85 ° C. Please be careful not to burn 5V-1A-2A-3A: The USB discharge loader designed according to Ohm's law (voltage/resistance value=output current) can obtain three kinds of current aging by controlling to load different power resistance values through the above two switches The 1A/2A/3A. board contains corresponding indicator lights with different resistors and power indicator lights, which are clear and clear. Easy to use, it can age test the power bank mobile power charger. 5V USB test Third gear selectable (1A/2A/3A) Indicator light display status A designed according to the principle of ohm's law and through the resistor in parallel through a different switch, can produce 3 kinds of resistance of a new USB electronic load resistance discharge, when all the switch opens, is 2.2 ohm/10W, 4.7 ohm/10W, 2 kinds of resistance in parallel at the same time, in 5V voltage almost can produce 3A discharge current. The actual current size, please according to ohm's law: I = U/R Resistor in parallel calculation formula: R=1/(1/R1+1/R2+...+1/Rn) D2=4.7Ohm/10W , D3=2.5Ohm/10W Plug the USB plug into the 5V output interface, but due to the maximum power limit of the resistance and resistance, it cannot be connected to the fast charging interface above 5V. After powering on, the power indicator light D1 will light up. Switch S1 to the "ON" position, D2 lights up, and the resistance of 4R7 starts working, with a current of approximately 1A. Switch S2 to the "ON" position, D3 lights up, and the resistor of 2R5 starts working, with a current of approximately 2A. If S1 and S2 are simultaneously turned to the "ON" position, both resistors will operate with a current of approximately 3A. _x000D_