I think you've been misinformed - ReMarkable pens have replaceable nibs (tips), because they get worn away as you use them, but they are not powered at all (unless there's a new aspect to the Pro's market that I'm not aware of?)
For what it's worth: the reason it needs those tips is they are what helps it feel like writing on paper, but the tips can be put into third-party stylos - if you search Reddit or elsewhere you'll find plenty of people discussing alternatives.
For what it's worth: the reason it needs those tips is they are what helps it feel like writing on paper, but the tips can be put into third-party stylos - if you search Reddit or elsewhere you'll find plenty of people discussing alternatives.