This is a very unique and feature-rich little USB 3.0 Power Monitor (compatible with USB 2.0 ports as well). It gives you real time readings of the voltage, current and cumulative amp-hour and watt-hour statistics, down to 1mV, 0.1mA, 0.1mAh and 0.1mWh resolutions. It also has graphing capability to display the voltage and current curves over time. It is highly configurable and can be calibrated easily.
1. The Red version is physically slightly smaller (about 8mm shorter, width and thickness are about the same).
2. The Red version does NOT offer the 3 USB connection modes (direct/fast charge/disconnect) as in the Yellow/Blue versions.
3. The Red version has a new screen that displays the D+ and D- data line voltages from the USB power source (see attached picture).
Martin Lorton of the popular MJLorton YouTube channel has done a very positive review on the original Yellow version of the device, watch it here: http://youtu.be/kYQz88ZclRA
Specifications:
Input voltage: DC 3.5V-13V
Input current: +- 3A
Voltage resolution: 0.001V
Current resolution: 0.0001A
Cumulative capacity: 0-99999Ah; 0-99999Wh
Capacity resolution: 0.0001Ah; 0.0001Wh
Accuracy: Voltage 1%+5d; Current 0.1%+2d; Ah capacity 0.5%
Display: 0.91" 128x32 pixel OLED
Update rate: Every 0.36s
Idle current consumption: ~6mA (with blank screen)
Current shunt resistance: 10mOhm
Overall circuit resistive loss: ~40mOhm (excluding USB connectors)
Memory: FRAM, good for 10 billion write cycles
Memory operation mode: write on every update in cumulative capacity + load balancing technique