USB Voltage and Current Tester, 3–7.5V

See the voltage and current on a compatible low-voltage USB connection. This compact tester is specified for 3–7.5V and up to 2.5A. It is for users making a basic charging-path comparison.

• ✅ See the voltage directly — A numerical readout shows the USB supply value.
• ✅ Observe current draw — The tester displays current within its stated range.
• ✅ Compare compatible charging setups — Readings can reveal differences between sources or loads.

A basic low-voltage USB check

Use only within the detailed 3–7.5V and 0–2.5A limits. Do not connect higher-voltage fast-charge profiles on the assumption that every USB accessory supports them.

The product does not establish USB-C connector geometry or advanced protocol functions, so check the actual unit. A current reading alone does not prove charger quality, battery health or available capacity.

Technical details

• Type: USB voltage/current tester
• Voltage range stated: 3–7.5V
• Current range stated: 0–2.5A
• Data recording: Not specified
• Quantity: One tester

Keep the connection within the stated limits and make a clear basic USB power check.

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