Common eBike problems and solutions

Hey everyone!

Been riding my eMTB (a full-suspension Haibike) quite a bit lately, putting in about 30-40 miles a week on mixed trails and some road. It got me thinking about common eBike hiccups we all face. What are some of the most frequent problems you've encountered with your eBikes, and more importantly, what clever solutions or DIY fixes have you found? I'm curious about everything from battery quirks to motor noises or even display issues. Let's share some wisdom!