The PowerSkin Hybrid Battery Charger with Micro-USB allows you to add a bit more power to your smartphone just when you need it. See Galaxy S3 accessories here: http://goo.gl/hHkhel
The battery pack has loads of little suction cups that when pressed to the smartphone allow the battery to stay attached and the rubber micro-USB plug is flexible enough to allow easy installation for a wide variety of Smartphones from Samsung Galaxy to Blackberry.
You do need to have a flat shiny surface on the back of the device or it wont stick to it properly. Check out: http://www.powerskin.co.uk for more info or visit us: http://androidizen.com for more Android Reviews ****
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***** Galaxy S6 review https://www.youtube.com/watch?v=2W-s3c0CWJ4