That’s about where I am. If I’m doing really light duty stuff (web browsing, no video) I can get maybe an hour. Any more than that, the clock is ticking pretty fast.

I’ve done several repairs and battery replacements on various tablets, but as an amateur, I won’t touch this one. I’m sure if you crack these things regularly you can get proficient at it, but given the complexity, I’m not sure it’s worth the labor.

One caution on older Surface Pros: They are generally not serviceable, and when the batteries eventually go, you will have to replace the device. The 9th gen and later may be better. I am dealing with this right now in a 2017/5th gen Surface Pro. While it’s nice hardware (as a user), apparently the battery is glued-in in such a way that you cannot replace it without destroying the tablet. I’m currently looking to replace it with either a Lenovo ThinkPad X12 detachable or a Dell Latitude 7320 detachable, both of which are similar but (purportedly) much more repairable.