Product Features: The most powerful Galaxy S4 battery case on the market Over 150% of Extra Battery Life Features a 4000 mAH battery (Galaxy S4 contains an internal 2600 mAH battery) Battery is over one and a half times the capacity of Galaxy S4 Super lightweight and protective case Camera opening built into case so you can still take amazing photos USB charging and syncing without needing to remove your Galaxy S4 from the case Built in kick stand feature for easy video watching Sleek and elegant design Non-Slip comfort grip Available in Black or White High quality lithium polymer battery On and Off switch on back of case allows you to only use the back-up battery when needed 4 LED lights tell you the status of the back-up battery (25% of battery life remaining for each light lit)