The ENERGI Sliding Power Case [$79.99] features a removable 2800mAh battery sleeve, which adds a mere 10mm to the length of the Galaxy S5. It has the same battery capacity as the original battery in the Galaxy S5 phone, doubling your battery capacity. Slide on the Power Sleeve only when power is needed. Slide off to enjoy the streamlined new and improved inner case; a dual-layered co-molded TPU case providing real world protection, quality and feel, providing the best of both worlds; protection and all day power when you need it.