10 hour battery life was achievable 15 years ago on Pentium M provided you under-volted, under-clocked, and had a high capacity battery.

How far does this goalpost go?

The point is that the technology for long life laptops has been ready for a long time. It's just that Intel marketing calls all the shots and they only wanted to sell multicore space heaters with space heater memory to sweeten the deal. With this burden on chipset side, it was impossible to compensate with extra amp hours and maintain portable weight.

> The point is that the technology for long life laptops has been ready for a long time.

You're desperately moving the goal post to ridiculous places. It's like claiming that walking on the moon is supposed to be considered normal just because the technology has been ready for a long time.

That claim is irrelevant, isn't it? I mean, what good does a "technically it's possible" claim do if a) no, it's clearly not possible outside exceptionally rare circumstances b) the average consumer device is way behind any of those outlandish claims.

> (...) provided you under-volted, under-clocked, and had a high capacity battery.

The fact alone that you're talking about using/adding a nonstandard and exceptional battery is more than enough to throw out that claim.

If you took the small 2010 macbook air and doubled the size of its battery you'd be extremely close to 10 hours and 3 pounds, so I wouldn't go with "unthinkable".