QuickerTek EyeBattery

EyeBattery - Li-ion Polymer 400Ahr, 10-12 h - Comes with Magsafe 2
- Works with 13” and 15” MacBook Pros with Retina Display
- Charges and powers computer simultaneously
- Extends computing time 10 to 30 hours, depending on model, setup and use
- Charges to full capacity in four to eight hours
- Highest charge density of any battery on the market
- Mobile - durable machined alumininum case allows you to take it anywhere