Does your USB cable or USB adapter work properly? Do you know how much power your USB charging sticks actually hold? JVR TL59 OLED USB Power Meter can help you easily identify the best cables for USB charging. It shows the voltage, watts, amperage, and the mAh being delivered to your devices. Bright clear display is easy to read and rotation screen for best review. *USB Charging Monitor TL59 shows 4 essentials simultaneously, current, voltage, power and capacity. It is a handy gadget for discovering how much power your USB ports will put out, how much your device will actually draw, how much it takes to fully charge a device, etc. *OLED Screen 0.91inch OLED display is bright enough to see both indoor and outdoor. Current, voltage, and power (current multiplied by voltage) are continuously displayed, and capacity (in mAh) accumulates as long as the input power remains on. *Milliampere Accumulator JVR tester has an accumulator for the number of milliampere-hours of current that have passed through the device. When powered up again, the accumulator flashes the total number of the last test until the new device under test has drawn 1 mAh. *Voltage Reminding When the voltage is less than 4.7 or greater than 5.3 volts, the arrow will be flashing to remind the voltage is too low or too high. Only when the voltage becomes to 4.7-5.3V, the arrow can be disappeared. *Display Flip The readout can be flipped in case you have to plug it in "upside down". The screen rotation button is behind the center perforation. Just press the button, the display will be inverted. Specifications: Voltage range: DC 3.70-13.0V Current range: DC 0.00-3.00A Power range: 0-30.00W Capacity range: 0-99999mAh Size: 1.7 x 0.8 x 0.4 inch (L x W x H) Package included: 1 x JVR TL59 OLED USB meter 1 x User Manual
N**B
No throughput.
No output. First photo shows another brand of USB monitor and the load (a battery charger, in this case). Note how the load has two red charging lights lit? And that the USB monitor indicates 0.24A being supplied to the load? The second photo shows this model USB charger under review. Note the load lights are off? Note the current on the USB monitor is zero? The unit simply isn't functioning.
D**N
Simple & Functional
After I lost an earlier version of this tester, I replaced it with this model. A big improvement is the ability to retain a capacity reading when a battery pack is discharged to depletion for testing and everything shuts off - something my earlier model lacked. Otherwise the display is clearly visible and the device gives readings for voltage, current draw, power, and most importantly milliamp-hour capacity. It's a simple and straightforward tool.
A**H
Works well, excellent tester.
I have been using this to measure the output of the USB chargers. Has helped me couple of times to identify fake and faulty chargers. Worth to have one.
R**T
Four Stars
It's OK
G**R
Nice Tester
Nice simple little USB voltage analyzer. With a push of the button on back you can reverse the screen. Has no other features other than Volts, Amps, watts and time. Still very useful.
J**.
Awesome product
Works great, bought for my techy son and he loves it.
R**S
Five Stars
Cool device, works as advertised.
E**R
good product.
Works perfectly and tells me just what I want to know. Easy and simple to use. Fast delivery.
R**R
A nice little tool/toy
A nice little tool/toy, that allows me to easily see the current draw of USB devices. My tests using known devices indicate that the values given are fairly accurate.One very nice feature is the simple switch which will rotate the display by 180 degrees, so that you can easily read the text regardless of where the device is plugged in.
Trustpilot
1 month ago
2 months ago
