When the batteries go inside of these, most people either do the docking station modification and turn them into a desktop, or buy the adapters and turn them into a desktop.

But even that depends greatly on the specs of the Surface Pro 4

Generally, we encourage our clients to have the battery professionally replaced (It's an intense detailed process) Or if they're willing to attempt it themselves, to purchase three screen protectors, applying them all on top of the display before trying to remove it. We found this extra rigidity nearly eliminates the possibility of damaging the display.

If there are plans to repurpose it

The 4GB models are insufficient unless running an alternate OS like Tiny10, Linux Mint MATE, etc. The 8GB versions are borderline, while the 16GB models work best.

All of the 6th Generation m3, i5, or i7 Intel APUs installed are still useful in 2023, but with the Core m3-6Y30 being relegated to 4GB of RAM support only, It means the earlier limitations.

But the most simple repurposing is to use a wireless keyboard with track pad

Wireless Touch TV Keyboard with Built-In Touchpad Mouse Solid Stainless Ultra Compact Full Size Keyboard for TV-Connected Computer

And a mini DisplayPort to HDMI cable

Mini DisplayPort to HDMI Cable 6 Feet Cable (Thunderbolt Compatible) with Surface Pro

We just recently had one of our clients gift the setup to their granddaughter, basically for the same reasons.