Common eBike problems and solutions

Hey everyone!

Just got back from a killer ride on my full-suspension eMTB – tackled some gnarly singletrack and a few steep climbs, probably put in about 25 miles today. It got me thinking about common issues we all face with these awesome machines. What are some of the most frequent problems you've encountered with your mountain eBikes, and more importantly, what clever solutions or preventative measures have you found? I'm curious about everything from battery quirks to motor noises or suspension woes after a hard day on the trails!