Hello I have the same problem you comment, my perception is that battery life is lower that the stimations I have read in differents forums. I don’t have final because I didn’t use , but I passed crystakdiskmark and the SSD have 51 hours of use, so my unit is a replacement for other. If I don’t detect a critical failure of laptop I will not return because I don’t want to wait more time.
My teclast f7 came with a user and created it in Windows 10, hjkl , so it’s possible that this replace is from a user of this forum ???