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Apple could easily make a laptop with better battery - it would just be bigger, heavier and more expensive.

Elon Musk claims the same thing about Tesla - that he could easily increase the range on Tesla's cars if they wanted to: https://www.youtube.com/watch?v=wsixsRI-Sz4 . But with a range of ~300 miles he thinks they're fine.

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It's like when apple got to 7+ hours with battery life, their laptops started getting drastically smaller instead of continuing to have longer lasting batteries. I'd like to have a 400 mile tesla, but I'd like to have a tesla that doesn't weigh 40 tons first.

The current MacBook pro has with about 100Wh the largest battery you are allowed to carry onto airplanes - any larger battery would prohibit it traveling by air. So there is a very good reason not to make the battery any larger.

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