The addition of this cover more than doubles the weight of your Kindle, along with doubling its thickness and increasing the size of its footprint to slightly larger than the Kindle Keyboard. (ereadertech.com)
The Juice Pack also nearly doubles the thickness — the HTC One was 9.3 mm at its thinnest — but theres a gentle curving toward the edges that tempers that somewhat. (androidcentral.com)
The myCharge freedom offers at 2000 mAh battery that doesn't add to the phone's height but it does double the thickness. (businessinsider.com)