Part of this is due to its smaller size and lighter weight, but it is also thanks to that 14 mm battery compartment at the back of the device. (theguardian.com)
We're also big fans of the sealed battery compartment. (tinyfry.com)
The ZENS battery compartment door with wireless charging capabilities is available in both Marble White and Pebble Blue to perfectly match the color of the Samsung Galaxy S3. (makezens.com)