Reliable laptop notebook new or refurbished up to 700 euro for homeschooling?

Our old Acer (10 years, 15.6 inch Pentium DualCore from the Vista era) still works but is unbearably slow for office applications and especially teams.

A new acquisition must be made as soon as possible, the requirements as follows

- 15.6 to 17 inch size, FHD IPS, 512GB SSD, min.8GB RAM, SD slot, Windows 10, up to 700 EUR budget

It should be stable and reliable or long-lasting, especially since the device remains stationary on the table.

How long do the current models with built-in batteries last? Experience and suggestions?

I found one here

https://www.cyberport.de/?DEEP=1C31-3P7&APID=117

What about refurbished devices?

https://www.pcbilliger.de/notebook-laptop/hp/10678/hp-elitebook-850-g3-15-6-zoll-full-hd-laptop-notebook-intel-core-i5-6200u-2x-2-3-ghz-webcam?c=8

I once had problems with Hp. But what you found at Cyberport is much better. Mainly because the Lenovo has built in a hexa core with a strong graphics unit. Unfortunately, the Hp only has a dual core inside.

For 700 euro you get a 1a office laptop, e.g. The one that you have linked (cyberport link).

The Lenovo ideapad 3 17 inch offer at Cyberport is unfortunately no longer available:-(

What do you think

Acer Aspire 3 17 inch

https://www.google.de/...tr0:703960 | 703967, pdtr1: 741478 | 741482, pdtr2: 1020486 | 43.18000030517578 $ 43.18000030517578, vw: l, init_ar: SgeyBAQIi6og, ss: 44 & prmd = sivn & prds = eto: 8921698

Acer Aspire 5 (unfortunately only 15 inches)

https://www.idealo.de/...-acer.html

Are the Acer more reliable than Lenovo and how long do the batteries last?