Full timelapse of 6 hour battery test: https://www.youtube.com/watch?v=e_L6yKInW-k See the machines here: https://nesherequipment.com/ 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 (null. 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