Common eBike problems and solutions

Hey everyone!

Been riding my eMTB (a full-suspension Specialized Levo) pretty hard lately, doing a lot of trail riding and commuting about 20 miles a day. It got me thinking: what are some of the most common issues you all run into with your eBikes, regardless of type? I'm curious about everything from battery degradation to motor quirks or even just annoying creaks. What solutions have you found work best, especially for those of us who push our bikes a bit?