A circle of light is lit during the entire time the devices charge. It gradually decreases in intensity and did the reverse continuously. It is white when the unit is above 70%, then goes blue up to 30% before ending with red color indicating the charge cycle ends. This is convenient but it can hinder some people in a room in the dark. That said, we can always turn the battery no longer be bothered by the light.
The device is announced to 10,000 mAh for charging multiple devices simultaneously or several times the same (depending on the battery capacity of the unit to load). It has 2 USB ports, a classic 1A and the other so-called quick charging 2.1A, especially for Apple products. In test, I have not encountered any problems. However, it should be noted that the charge of consuming devices tablet type is slower than with a conventional charger. For example, while my tablet gains 5% of battery every 10 minutes, it took almost 15 with the external battery. However, this defect is not peculiar to this external battery, all with the same gap by charging large batteries slower than on the sector. The charging time of the battery itself is about 8 hours on the computer or 6 hours on the sector (not supplied charger).
In summary, this external battery has done its job. She holds in one hand and is relatively lightweight (236 g). The camera turns off by itself after a few seconds if it is turned on or you accidentally remove a load device. Aukey also offers a reassuring warranty of 18 months. What to experiment with confidence.