How to do common ELECTRIC bike maintenance

E-bikes seen in this video:
Engwe P26 https://engwe-bikes.com/products/p26
Wallke X3 Pro https://wallkeebike.com/products/wall...
ADO Air https://www.adoebike.com/products/ado...
Ride1Up Roadster V2 Gravel Edition https://ride1up.com/product/roadster-v2/
My book "DIY Lithium Batteries" on sale at http://amzn.to/2jbxvzS
My book "Ultimate DIY eBike Guide" on sale at: http://amzn.to/2BGx4Fn

The gear I use to make my videos:
Camera - Sony A6600: https://amzn.to/33twRHW
Lens - Sony 16-55mm F2.8: https://amzn.to/3K8X6nR
Thermal camera for iPhone/Android: http://amzn.to/2FikWvW
Drone for "follow me" filming: https://amzn.to/2UFOds5
Camera for invisible selfie stick shots: https://amzn.to/2Vb9D0r

**Question response book giveaway rules**
When you guys asks questions in the comments of my videos, I'll try to answer them. If there are questions that I think would make a good video response, I'll choose them to do a longer segment. If I choose your question for a video response, you'll win a copy of my book The Ultimate DIY Ebike Guide (the paperback or the ebook), or my book DIY Lithium Batteries.
Here are some things that YouTube makes me say: This contest is not sponsored by YouTube and YouTube isn't affiliated with it. I'm supposed to provide a link to the community guidelines for YouTube (http://www.youtube.com/t/community_gu.... YouTube is not a sponsor of this "contest" and by participating, you are releasing YouTube from any potential liability, whatever that might be. Privacy notice: I won't steal your info. If you do win, you can choose to send me your address so I can mail you a paperback copy of the book (or some other prize if that changes) or you can send me an email address and I'll send you a copy of the ebook. I will do everything in my power to immediately forget your personal information afterwards.

Outro Music: BenSounds