I think part of the problem is that even a 1:1 match for battery capacity won't yield anywhere near the same battery life, so why bother? As a manufacturer you

I think part of the problem is that even a 1:1 match for battery capacity won't yield anywhere near the same battery life, so why bother? As a manufacturer you'd add significant weight and cost and still not be competitive with a MacBook's battery life. Windows' laptop problems start with hardware, and a lost decade of mobile x86 chips failing to optimize for power efficiency, and a commensurate lack of investment in ARM alternatives after getting burned on Windows RT.