@4b16f0b6 LOL  literally 5 seconds into the video and I see him standing in front of 4 Li batteries with their brand (all particular brand) facing the camera and a bunch of others with the labels turned or covered with electrical tape.  Scroll to first few seconds of the Conclusion chapter marker "And that's why my data shows lithium batteries are a better investment." Surprise!!

Could be true, but I'm surprised it's not labeled anywhere as sponsored.  He even links to said brand of battery.