Input: 100-240V~1.5A @ 50Hz-60Hz; Output: 20V, 4.25A max; Upgraded design with 2 additional USB ports; LED indicator light changes from amber to green when fully charged; Powers Li-Ion & Li-Poly batteries while off, on or in sleep mode; Powers system without operating battery; Compatible with 15"-17" MacBook Pro(R); Includes upright stand & power cables; 90-day warranty; 85W;