Update 12/15 1:52PM: Groupon has 2 MagSafe Power Adapters for MacBook Air or MacBook Pro starting at only $29.99 shipped

Be prepared for wear and tear — and the next time you leave your charger at home — by picking up a MagSafe 2 Power Adapter from 9to5Toys Specials for just $40 shipped. It comes in plastic bag packaging. (Note: Groupon has a 60W MagSafe for $33.99)

Apple’s power adapter is both beautiful and practical, with a magnetic DC connector that sticks for charging, but can be pulled out to save your laptop. But those of us who have owned Macbooks before will be aware that the MagSafe cable can fray with everyday abuse. Version 2 has a strong join between the cable and the connector — traditionally a weak spot — and it is solidly built elsewhere. The MagSafe 2 is capable of running your Macbook even with a dead battery, and as with all Apple adapters, the cable reel keeps things tidy.

The current deal takes 49% off the 45W version of the MagSafe 2 (for Macbook Air) with free shipping. 60W and 85W versions of the MagSafe 2 Power Adapter are also available.