Electronic DC Load USB Resistor with Switch, Adjustable 5V 1A/2A/3A Battery Discharge Tester

$39.95
+ $4.99 Shipping

Electronic DC Load USB Resistor with Switch, Adjustable 5V 1A/2A/3A Battery Discharge Tester

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Electronic DC Load USB Resistor with Switch, Adjustable 5V 1A/2A/3A Battery Discharge Tester

$39.95

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$59.00
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Product details

Product details

Electronic DC Load USB Resistor with Switch, Adjustable 5V 1A/2A/3A Battery Discharge Tester

Electronic USB Load Resistor with Switch This electronic load resistor offers a practical way to test USB power sources, battery capacity and discharge performance. Designed around Ohm's law, it uses parallel resistance to create different load levels, making it a useful tool for anyone working with 5V USB devices, power banks or battery packs. How the Resistance Switching Works The unit contains resistors that can be combined in parallel using the built-in switch. When all switches are open, the device presents a 2.2 Ohm and a 4.7 Ohm resistance simultaneously, giving a combined parallel resistance of approximately 1.5 Ohm. At a 5V supply voltage, this configuration can draw a discharge current of nearly 3A. The parallel resistance formula R = 1/(1/R1 + 1/R2 + ... + 1/Rn) governs the combined value, and the switch arrangement allows you to generate three distinct resistance types for different testing needs. Practical Testing and Discharge Use With a 10W power rating across the resistor network, this compact load is suited to discharge testing of USB batteries and power supplies. By selecting different switch positions, you can vary the load and observe how the source responds under different current draws. The actual current in any configuration follows Ohm's law, I = V/R, so you can calculate the expected draw for your specific test voltage. This makes it a straightforward, repeatable tool for bench testing, troubleshooting or evaluating the real capacity of 5V power sources rated at 1A, 2A or 3A.
  • Fruugo ID: 553890337-1120301244
  • EAN: 6486896177042
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  • QIYANG QIUDUO TRADING CO., LTD.
  • QIYANG QIUDUO TRADING CO., LTD.
  • Commercial City Plaza Shop 1-19
  • Panlong Middle Road, Longshan Street, Qiyang
  • Yongzhou
  • CN
  • 426100
  • [email protected]
  • 8615661492615

Responsible Person in the EU
The following information outlines the contact information for the responsible person in the EU. The responsible person is the designated economic operator based in the EU who is responsible for the compliance obligations relating to the relevant product sold into the European Union.

  • Apex CE Specialists GmbH
  • Apex CE Specialists GmbH
  • Grafenberger Allee 277
  • Düsseldorf
  • DE
  • 40237
  • [email protected]
  • 4921186392011
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  • STANDARD: $4.99 - Delivery between Tue 17 November 2026–Thu 26 November 2026

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