Tanga has the Lenmar ChugPlug External Power Pack for MacBook Air or Pro for $67.99 (129.99 – 62 instant savings) with Free Shipping for a limited time.

The Freedom to go anywhere! With the ChugPlug in your laptop bag, you and your MacBook are primed to roam a world littered with dying Macbook Computers. The ChugPlug gives your the power to move; the power to survive; the power to thrive.

The ChugPlug charges and powers 45W and 65W MacBook computers using your existing Apple AC Power Cable and MagSafe Power Adapter. Get up to 4 hours of additional run time without being tethered to an outlet.