The Galaxy S5's 2,800 mAh battery will last you all day, but if you need even more juice, Tylt's Energi Sliding Power Case will keep you powered. With a 2,500 mAh li-ion battery, the Energi can double your S5's endurance while protecting it. If you don't want to keep charging your phone, just slide it out of the exterior charging sleeve. You phone will still be covered by a slim interior lining to protect it from scratches. A cutout on the back of the case allows easy access to the S5's heart rate monitor and an LED light indicates remaining power. Energi for the S5 wil be available in coming weeks for $79.99 in blue or gray (inside) and pink and purple (exterior).