Apple laptops like Macbooks, Macbook Airs and Macbook Pros use Magsafe power adapters. But somewhere along the line Apple redesigned their Magsafe power adapter so it would take up less space, resulting in a problem for people with some older and newer laptops: the older Apple laptop power adapters wouldn’t work with the newer laptops. Thankfully there is a Magsafe to Magsafe 2 adapter you can get to make your older Macbook power adapter work with a newer laptop.
This is the genuine Apple-made Magsafe to Magsafe 2 adapter. It plugs into your old Magsafe power adapter (which plugs in at a right angle) and converts it to a Magsafe 2 (T-shaped) power Apple laptop power adapter. The Magsafe to Magsafe 2 power adapter works with both 45W and 85W devices. Note that this tiny component is easily lost so you may want to get a Magcozy (see below) to help attach it to your power cable.
The Magcozy adapter keeper is a very clever little third party device that prevents your Magsafe converter from getting lost. It is a strap made of flexible plastic that holds your Magsafe converter to the power cable itself so it doesn’t go astray. It comes in a variety of colors from white to red, blue and other colors for personalization.