USB-device-currents
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Various USB devices and their current draw
| Device | Idle | Max | Comments |
| Basic USB keyboard | 5mA | 45mA | Leds (caps, num, scroll) add most current! |
| Optical mouse | 17.3mA | 32mA | Logitech M-BZ96C |
| Argent Data OpenTrackerUSB | 23mA | 23mA | |
| Edimax EW-7811Un WiFi | 34mA | 85mA | idle at 34mA with short bursts of 71mA |
| 2.5" Sata HDD in USB enclosure | 180mA | 600mA | |
| Raspberry Pi (model A) | 160mA | 191mA | Without Ethernet controller and 1 USB port |
| Raspberry Pi (model B) | 404mA | 367mA | With Ethernet controller and 2 USB ports |