This portable charger is similar to an external hard drive, as much by its aspect as by its weight. He charges through USB and comes with two charging cables, one short and one long. The device is equipped with two USB ports (2.1 and 2.4A) and automatically adapts to the connected devices. When reloading, a bright blue progress bar appears, and turns off when charging is complete. Avoid charging the device next to you when you sleep if you are easily disturbed, it illuminates a little bit anyway, but nothing embarrassing in my opinion. An ignition button is used to check the level remaining on the battery, but also to activate an LED that serves as a flashlight. It surprised me at first, but why not. Otherwise, use, no need to turn it on, the charger automatically detects the connected device and starts charging. It also switches off automatically once the load and then emits a short blue light. This charger is especially convenient when traveling or on the go because it can charge two devices simultaneously, and several times each. It also comes with a carrying case. If you do not look for a "miniature" magazine (it is 12.5 cm on 8cm), this device is really ideal and powerful.