Concord Keystone (http://www.concordkeystone.com) has launched the US$44.99 Keystone ECO Booster 2.0, a lightweight 2000 mAh Li-Polymer portable battery pack for iPhone/iPod products and Android smart phones.
The portable battery pack comes with a built-in retractable Micro USB charging cable, so it recharges smart phones without the need for additional cables. Pull out the retractable micro-USB cable and connect it to your smart phone. Blue LED indicator lights let you know that charging is taking place and displays the power level in the battery pack.
Another feature of the Booster 2.0 is that it can be attached to the back of the phone using an adhesive gel pad concealed beneath a removable, snap-on protective cover. When the cover is removed, it can be placed on the back of the unit to act as a horizontal or vertical stand so you can view the screen and charge the phone simultaneously.
The Booster 2.0 is 0.4 inches thin and 2.5 ounces in weight. As a bonus, it includes an iPhone/iPod adaptor.