If you own one of Apple’s Retina MacBook Pros (from 2012–2015, which is the model before the newest, Touch Bar-equipped iteration), then you know that they’re not exactly meant to be taken apart once you’ve bought one. Most parts are attached directly to the logic board, and the battery is particularly hostile to user replacement. The entire unit is physically glued in place with some industrial adhesive.

Still, the good folks over at iFixit believe that everyone should be able to repair, replace, and upgrade the gadgets that they own, and they’ve spent some serious time and effort coming up with a way to allow Retina MacBook Pro users to replace their batteries, allowing them to dramatically extend the usable lifespan of their laptops.

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