Tylt GS6EWCPCBK-T Energi Sliding Power Case for Galaxy S6/S6 Edge Rechargeable 3,400 mAh removable power sleeve. Built-in Qi Wireless Charging. Automatically stops charging when phone is at 100% to save power for later Dual-layer inner case extends above screen for greater protection. 2.1 AMP high speed charging to your Galaxy S6 and power sleeve.