lipo battery pack

I found this on Google, has anyone used or know it? I feel that the price is very favorable and I want to try it. https://www.tindlingshop.com/collections/new-series-launches-sale

New Series & New Products Arrival!!!!! Tindling using the latest chemistry technology to provide sufficient capacity for your RC airplane or RC car trucks models. https://www.tindlingshop.com/collections/new-series

A LiPo cell has a nominal voltage of 3.7V, and a lipo cell = 1 cell = 1S = 3.7V. For the 14.8V battery above, that means that there are four cells in series (which means the voltage gets added together). This is sometimes why you will hear people talk about a “4S” battery pack – it means that...