BatteryBox Designed to work with all MacBook's with the Magsafe2 connector Minimizes the number of cycles (and stress) on the MacBook battery, prolonging its life It includes a fast charging USB 2.1A output to quickly charge up your phone, tablet or anything else Patented batteryOS artificial intelligence technology keeps battery protected and working like new The package includes battery box, 2A USB charger, snap fit connector clips and gold Micro USB cable