Hi @ryanwentzel208 ,
According to the following links, the same battery (BL-T39) is used in both phones, so it should be OK.
[https://www.amazon.com/LG-G7-Fit-LM-Q850QM-Replacement-Battery-BL-T39-Adhesive/dp/B08GPGRVDX|G7 Fit]
[https://www.ebay.com.au/itm/372789140222|G7 ThinQ]