Cracking Open the Alienware M14x: Removing the bottom cover

Yeah, that's it.
&, by d way, do u know any given tablet that have a replaceable battery ? Huumm, neither do I.
Still want one, though ...

You are comparing David with Goliath.
Alienware 14 inch screen it's much smaller and sacrifices must be made for the low profile to be kept. For a heavy traveler (planes, buses and other) this piece of small jewellery worth like 3 times your huge ASUS at 17 inches.
And for the others witch complain about DELL:
- I had a DELL Inspiron build in Ireland still works after 5 years NOT EVEN 1 PROBLEM;
- I have a DELL XPS 13 build in Malayesia (bought it in BEST BUY) working PERFECTLY after 3 years
Both were used extensively in various atmospheric conditions (YES OUTSIDE of the house) and in sometimes continuous gaming sessions of around 10 hours.
So sorry for u, maybe u are unlucky and also sorry for DELL for not trying to correct their mistakes in good time.
For both of them I did not use support except for updating my drivers.

I may be misinterpreting the photos, but it looks to me like you have to crack the case to replace the battery. Unbelievable. Talked about forced obsolescence.
I sincerely hope that this isn't the direction manufacturers are going. On my battery-driven machines, the battery is almost always the first thing to go, usually in about three years. (And don't tell me I'm "charging it wrong" -- puh-leeze.)
The non-replaceable battery in all of Apple's iStuff is one of the reasons I won't buy Apple. I can't afford to drop two grand on a machine every three years, and I already own enough paperweights to last me the rest of my life.