KEWEISI KWS-V20 Digital USB Voltage Current Capacity Tester 4-20V 0-3A
$9.95
KEWEISI KWS-V20 compact digital inline USB power tester designed for electronics bench testing, troubleshooting, charger evaluation, power-bank checks, battery testing, USB cable testing, and general low-voltage diagnostic work. The tester connects between a USB power source and USB load and displays voltage, current draw, elapsed operating time, and accumulated capacity in mAh. Manufacturer specifications printed on the package list a 4-20V voltage range, 0-3A current range, 0-99 hour time range, and 0-99999mAh accumulated capacity range.
HISTORICAL: Small inline USB power meters became increasingly common electronics-bench tools as USB chargers, rechargeable battery packs, mobile devices, development boards, and portable power banks became widespread. They gave technicians and hobbyists a convenient way to observe supply voltage and actual load current while equipment remained powered. Models with accumulated mAh measurement also provided a practical way to evaluate charging behavior and delivered capacity over longer tests without requiring a full laboratory power-analysis setup.
The KWS-V20 features USB-A input and output connections, an illuminated digital display, transparent housing, and reset control. Useful for electronics technicians, repair shops, hobbyists, experimenters, makers, computer-service benches, battery and power-bank testing, USB charger troubleshooting, development-board work, and general electronics bench use. This is measurement equipment only and does not regulate or supply the power being tested.
Origin Tracker
Bench Stock
Pulled from RF Boneyard bench/service stock for practical repair and restoration use.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Standard USB-A power sources and USB-A powered loads operating within the tester's stated 4-20V and 0-3A measurement range. Suitable for compatible USB chargers, power banks, battery packs, USB cables, development boards, small electronic devices, and other USB-powered equipment. Buyer must verify connector type, operating voltage, current requirements, and suitability before use.
RF Boneyard Bench Notes
Bench powered and verified operational. Display showed approximately 5.07V during RF Boneyard bench testing. Display illumination and measurement functions were observed operating. Measurement accuracy has not been laboratory calibrated or certified.
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