I'm considering getting the OWC Thunderbolt 3 dock for my 2017 15" MacBook Pro. From the reviews, apart from the price, it appears that the only downside is that it charges at 60 watts vs. 85 watts. I'm assuming this will still charge the laptop, even when in use. Is there any danger to the 15" MBP by charging at 60 watts? I don't mind if the charging is just slow, I just don't want to damage my MBP and also want to ensure that at use, my batter won't go down when plugged in to this unit.