Side question, how long do these refurbished devices last? It obviously cannot last as long as a brand-new device, which means it will fall apart sooner, is that not the case?
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Why are you buying a laptop if you do not need the battery? An older generation tower + peripherals can also be assembled or bought for less than a new laptop.
I have a refurbished Dell Latitude E6440 now since at least 2017 and it still works like a charm. When I purchased it I could barely see any signs of usage, lucky me. The battery that came with the laptop is still quite OK. To preserve battery life and when I don't need the battery when I can run the laptop on a power cord, I usually disconnect the battery when it is charged around 40%. On a Latitude you could also configure the battery management to only charge the battery to 50% max. when you're always plugged to the power cord. Such low charging levels are beneficial for battery life and endurance. I treat my laptops also always with some care and don't bang them around.
Other refurbished laptops I use are a Thinkpad T520 and another Dell Latitude E7440. Both work just fine for years now.