Kool Tools; EyeBattery for the MacBook Pro
You can never have too much juice for your laptop. Which is where QuickerTek's US$299.95 EyeBattery for all MacBook Pros comes in handy. It adds up to four extra hours of battery power to the MacBook Pro.
There's a model designed for MagSafe 1 and another for Magsafe 2 power connector laptops. Like the rest of QuickerTek's mobile power product line, the new EyeBattery also charges the internal MacBook battery while it powers the laptop. Usually you have to wait while your battery charges, but EyeBattery delivers "use and charge" capability to maximize time with your laptop. The QuickerTek battery charges in 4-8 hours. LEDs show the charge level so you know at any time how much charge remains.
The EyeBattery is also designed to go mobile with you as it weighs only one pound. Constructed of machined aluminum, it's also durable.
The EyeBattery works with all MacBook Pro laptops, including the latest Retina display versions. What's more, you can even charge your EyeBattery from one of QuickerTek's Solar Juicz solar power chargers.
For more info go to http://www.quickertek.com/batteries.html .