Kunkune

USB Current Voltage Charging Detector

USB charging current and voltage in real time

USB Current Voltage Charging Detector - Main image
$3.19 $4.9 In stock

Category: DC to DC Converters

Low cost solution to check USB charging current and voltage in real time.
Portable, light weight, small size and durable, no extra cable or power supply needed.
Must have gadget for DIY fans and hi-tech lovers.
Widely 3.5V-7V voltage and 0A-3A current test range support with accurate readings
All-in-one piece without blocking other usb ports when sensoring USB charging current or voltage.

Specification:
Measurement accuracy: 1%.
Voltage range: 3.5V-7V.
Current range: 0A-3A.
Working current: 20mA.
Storage temperature: -10°C to +65°C.
Meter pressure drop: 200mV.

Size: 52 x 20 x 15 mm.

A final check before payment

Review your options, quantities and the final total before confirming.

Ordering for an occasion

Delivery times are estimates, so leave time before your occasion.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If plans change

Ask the store about your order before making return or refund arrangements.

Please contact us for the refund processing timeframe before returning an item.

View policy
Planning delivery

Review the available services for your destination.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Return arrangements

Contact the store first to check the conditions for your item.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Jacob Z. ★★★★★

Plugged it between my charger and phone and instantly saw the real voltage and current—no extra cable needed, which is exactly what I wanted. For the price, it’s a solid little tool for anyone tinkering with USB power.

Steven ★★★★★

Finally, a way to see what my phone is actually pulling instead of guessing—this little plug-in tells me the voltage and current live, and it's so small I just leave it on my keychain. No extra cables or power supply to fuss with, which makes it a no-brainer for any DIY bench setup.

Jason ★★★★★

I plugged this into my phone charger and it showed the voltage dropping when I added a second device — exactly what I needed to test my power bank. The display is clear and updates fast enough to see changes in real time.