The device is extremely light and loads very quickly from the PC / Car / Outlet (for car and PC requires you to definitely the Survival Pack to have the plug). In the sun, it takes a little longer, but also on the balcony in the shade it loads with the help of solar panels on in about 8 hours.
When the unit arrived until it has with my iPhone 3GS is not working. I was very disappointed and wanted to return it. But then I called Energy Trends in the company and I immediately had a friendly gentleman on the phone who told me that the problem in some Iphones is due to a lack of surge protection.
But he has now adjusted the equipment and wanted to send a new me. The new device was within a short time as well, and now works correctly.
I use the combination solar panel ET-2 (tied to the backpack) + ET-1 in conjunction with my Iphone. The solar panel on the back has two pockets in which you can insert the ET-1. The cables are long enough that I can operate undisturbed the iPhone, even if it is connected to the ET-1. The constant charging of the ET1 device by the solar panel Et-2 ensures that I can use the Batteriesaugende Geoaching application + GPS for several hours even without the battery runs empty.
Even on a long flight or a camping holiday is the ET-1 battery very useful.
Even if the battery in the iPhone under 20%, it invites to readily namely by about 10% per 10-15 minutes.
If I then go do break, I close the ET1 either in the car or in a restaurant, etc. to a power outlet, which greatly accelerates the Wiederauflagung.
The devices are manufactured solid and of high quality, but still very small and light, which is why I have now ordered a second to ET-1.
I can wholeheartedly recommend the ET-1 and would advise everyone equal the ET-Survival Pack purchase. These devices compensate perfectly the biggest weakness of the iPhone - the battery.