The remade 518: I would strongly recommend ignoring it, unless I got some weird hw versions.
Never in my life have I had 3 mice on 4 different systems (mine, sisters laptop, moms desktop and laptop) purchased across a 1 year span on 3 different shops (all 518 remake) behave so unstable. It's not immediate. I actually had to clean up my old 518 and swap it with the new 518 so mom could safely boot her PC with an actual mouse cursor - at all times. Instead of phone calls and images of desktop and no mouse cursor. Unbelievable.
yeah, sure you can try and change USB ports to get it back online, but damn that hardware inside has been unreliable to me. Also, just feels cheap compared to the trusty original, which I luckily have two of (one still being used by mom). It has NEVER gone offline, not once.