Apologize in advance, I am very pleased with the USB power adapter from Wicked Chili. The power supply provides a current of 1A are the 1000mA. This should be considered before buying, so advance look at the back of your device or on the battery which requires the device for a Storm which you want to connect. For many devices is 5V and behind the amperage required. The adapter works if the device requires 1A or less. If it is not so does not the power supply. So now to my devices ... it works easily and invites to all my devices Super. The PSU does not make a sound, it is humming or buzzing not and will not be hot only slightly warmer (this is normal) I have it, used the navigation system and MP3 player for my iPad, Samsung Galaxy S3, Samsung Galaxy S4. It is a super-effective alternative to the original device adapter. It's just great to have an adapter plug that I can benefit for all USB chargeable devices and can be used directly with the data cable. In the hundreds of cables that anyway lying around in my plug is a big help. The appearance is very good and also the durability, it is not made of cheap plastic and certainly holds a lot from. I can only recommend this USB -Power supply because I'm really full and satisfied. All my devices without any problem becoming loaded just great. What I wish to emphasize once more the price is simply not to beat;) I got this USB power adapter from test.com for free trial.