The Samsung Galaxy S6 is a series of Android-based smartphones manufactured, developed, designed and marketed by Samsung Electronics. Succeeding the Samsung Galaxy S5, the S6 was not released as a singular model, but instead in two variations unveiled and marketed together—the Galaxy S6 and Galaxy S6 Edge—with the latter differentiated primarily by having a display that is wrapped along the sides of the device. It is distinguished from its predecessor through an internal battery with an increased charging speed but a decreased capacity, an optically stabilized camera, sound in slow motion video recordings, a glass back, and it lacks a user-replaceable battery, a memory card slot, water resistance, and MHL-to-HDMI connection for viewing on an external monitor or television set. The S6 was the first edge model, this continued with the release of the Galaxy S7 Edge and was discontinued with the introduction of the successor, the Galaxy S8+. The Edge name returned with the release of the S25 Edge.