SigFx Energy, LLC today announced their introduction of the SaFPWR® (pronounced "Safe Power") line of rechargeable battery cases for the iPhone 3G and 3GS.  The SaFPWR line currently offers more than 60 different combinations of styles, colors, materials, and features. Each battery case is built around a proprietary rechargeable lithium polymer "smart battery," allowing users to increase the runtime of their iPhone by 200% or more. SaFPWR cases are available in either 1200 mAh (standard) or 2,000 mAh (XR) configurations.

According to SigFx Energy spokesman, Brett Nelson, "All SaFPWR products feature the industry’s leading smart battery. The battery is slim and light, it knows exactly when to charge your phone and it optimizes your energy usage. SaFPWR batteries also protect smart phones from short-circuit, overcharge, and over-discharge using a proprietary, built-in technology. "Our product line represents a superior blend of fashion and function," said Nelson. "It’s the only line of battery cases to blend smart battery technology with such a wide range of fashionable product styles."

SaFPWR Smart Battery Cases can be purchased online at www.safpwr.com. The MSRP is $69.95 for X-typemodels, $79.95 for standard models and $99.95 for XR models. SaFPWR Smart Battery Cases are Apple® "Works with iPhone" certified.