OkCell 9v PP3 Lithium Battery - 12v Solar Shed

I like to find interesting new gadgets on eBay and when I was looking for a boring old battery I came across this...

Item links:
OKCell 9v 800mAh Battery: https://goo.gl/cJbvBz
7DayShop 9v NiMH Battery: https://goo.gl/Cmqxrh
TP4056 Module with Protection: https://goo.gl/7D56Ur
DC2DC Boost Converter: https://goo.gl/TNKWbw
Vici VC99 Multimeter: https://goo.gl/GdFAWT

Видео OkCell 9v PP3 Lithium Battery - 12v Solar Shed канала Adam Welch