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 My newest book "Electric Motorcycles 2019" on sale at: https://amzn.to/2LbJ2j0 The gear I use to make my videos: Camera - Nikon D5300: http://amzn.to/2DcuVlM Lens - Tamron 18mm - 270mm: http://amzn.to/2qLZlsG 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 Here are some of the products I use: Bafang BBS01 kit: http://s.click.aliexpress.com/e/N0sm1W1w Bafang BBS02 kit: http://s.click.aliexpress.com/e/EcGPWXRE Bafang BBSHD kit: http://s.click.aliexpress.com/e/MMNrZUC0 250W complete e-bike kit: http://s.click.aliexpress.com/e/cQzxxhpm 500W complete e-bike kit: http://s.click.aliexpress.com/e/o6rnMv1q 1,000W complete e-bike kit: http://s.click.aliexpress.com/e/NGZvnq3Q 36V 15Ah Hailong (shark) battery: http://s.click.aliexpress.com/e/CAEvhRSY 48V 15 Ah triangle battery: http://s.click.aliexpress.com/e/234OZ5Kg 52V 20 Ah triangle battery: http://s.click.aliexpress.com/e/m0huJ2PI All ebike batteries: https://goo.gl/7pAi9Z All 18650 cells: https://goo.gl/hYWnwU 100W Flexible solar panel: http://s.click.aliexpress.com/e/DurJQaTe 100W Folding solar panel: http://s.click.aliexpress.com/e/C9raRNuM Cycle Analyst: https://goo.gl/RsmE3N The parts that I use for building batteries: 18650 cells: https://goo.gl/aEabAQ 18650 positive insulating washer: https://goo.gl/HBVOuc Nickel strip: http://goo.gl/VIrNQq Spot welder: https://goo.gl/KN3Uaw BMSs: http://goo.gl/S6gSQx Silicone wire: http://goo.gl/xmpbKD Black 18650 cell spacers: http://goo.gl/hQxWF6 Vruzend cell spacers: https://goo.gl/5ReLqA Large heat shrink tubing: http://goo.gl/6v1ow9 Small heat shrink tubing: https://goo.gl/OU3Z6u Foam sheet for protecting battery: http://goo.gl/5e71tE Kapton tape: https://goo.gl/D6BT57 Chargers: https://goo.gl/js0T0V ***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