StackSocial has the BatteryBox Charger for Macbook and Mobile Devices for $134.99 (220 – 38% instant savings) with Free Shipping for a limited time.

With 60Wh of output energy contained in BatteryBox, it’s the highest energy density product of it’s kind. It has two outputs – one for powering your MacBook (up-to 13 hours of extra power), and the other for charging any USB device (up-to 80 hours of extra juice for your iPhone or equivalent USB device). It features BatteryOS, a new way of controlling energy inside of existing lithium-ion batteries, enabling it to hold more capacity and keep working like brand new after many years. It also bypassing your Macbook’s built-in battery and powers it directly, allowing for more energy to flow into the Macbook – adding on even more time to your freedom from the outlet and conservice the life of your Macbook’s battery. It only supports charging to Macbooks with Magsafe2, which are on most Macbooks made after mid-2012.