Continuing with the second season of DENIM, a contemporary collection of clothing from the minds of Vanquish and fragment design, the two collaborating Japanese brands offer an iPhone 4/4S case complete with an internal power supply. Most of us – the fortunate few with a smartphone – have to struggle daily with the evils of poor battery life, either begging co-workers to borrow their charger to gain a few percentage points, or hoarding multiple batteries for constant replacement. With help from the two innovative brands our traveling load and electronic stress has taken a much needed hit. Offered in black or white with a playful “smile” encryption on the back, this slim, lightweight shell provides a wireless charge adding hours to your current battery cycle. The Power-Pack Case can be yours here for ¥9,240 JPY (approximately $119 USD).