Mahir Istehad

Probably, but I don’t know what they are.  The very best battery life devices are going to have no gpu, which I can see you going for.  That’s some loong battery life though.  All it takes to do good battery life is a not-so-strong processor, a low power screen, thickness, and a big ass battery.  The actual leader may command a price premium but it’s possible that someone going for that but getting beat out may be a better buy.
 
you actually might be a shoe-in for an m1 air on sale.  Maybe things that try to compete with it.

Might be worth looking at the ASUS Zenbook 14 (non-OLED), although you may have to find an open box to hit your price target. It's thin and light, looks slick and remains speedy even in slightly older configs. Lenovo currently has the IdeaPad 5 and Yoga 6 on sale for under $900; I don't know if they're stellar, but they're at least solid.

Not sure how much that is in USD, but there are machines under $800USD that would do that.  Most of office is potato, though there are things that can be done with excel that aren’t. So unless you know how to use a pivot table power isn’t terribly important.  It’s screen and build quality that matter.  An iGP would be fine, which reduces cost a good bit.  You don’t have to have the power of a gaming machine. Even a Chromebook would probably do it though those things start to become stupid after about $500. Dell Lenovo and HP all do a lot of business stuff.  Fleet machines literally built for stuff like that.  If you’re willing to get weird an intel mac without a butterfly keyboard is also an option.  That would have to be used though. A case mostly of finding something you like to type on and that doesn’t give you a headache.  I understand windows hello (or whatever they call their facial recognition thing) is well liked.  I don’t know if you actually need massive battery life or not.

Imma make the creation tool again and let you know.

This is great. Alot of flexibility for a case and PSU. thanks

your welcome