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This USB load can be used with USB testers to test the charging power of rechargeable batteries, chargers, etc. It is easy and convenient. Adjustable: The current can be controlled by adjusting the resistance value by means of a push-button resistor link 1A/2A. With indicator light, always on to indicate that the standard output rating has been reached, off or flashing to indicate that the power supply is below the rated output standard. Parameters: Rated voltage 5V,rated current 1A/2A,adjustable resistance 2.5Ω/5Ω.Power: 10W-20W. Notice:Do not touch the load resistor to avoid burns, keep it away from flammable objects and do not measure for a long time.