The Feb. 1 ShopAndroid.com Deal of the Day is the Seidio 3500mAh Extended Battery w/ NFC for Galaxy S3. Tired of running out of battery life when you need it the most? When you can’t get to an outlet, this high quality NFC battery will keep you moving forward all day. It utilizes a premium Japanese cell to ensure the highest level of safety and performance, offering up to 60% more battery life than your stock battery. Comes with a replacement battery door.