There's nothing I hate more about new Apple MacBook Pros than the batteries that I can't replace myself. It's such an ordeal go get an aging battery replaced, and I tend to go through them within a few years, due to high usage. Nowadays Apple appears to be demanding that you mail the laptop to them, instead of allowing same-day replacement, which I've done in the past.

I loved my 2006 17-inch MacBook Pro, when I could simply flip the laptop over, unlatch the latches, and replace the battery entirely within seconds. It's an total shame we lost that. You could even carry an extra battery with you in a bag when traveling, in case you didn't have access to a charger.