LG G five won't turn on after removing modular battery

I have an LG G five that no longer works after I removed the modular battery component out of it.

I took my phone with me in a ziplock bag to the beach and foolishly and absentmindedly left it in my pocket when I went not the water. Though when I went back to shore after discovering it I removed it from the plastic bag and it still seemingly worked. Though later I discovered that the phone would no longer fast charge with the OEM charger that it had came with so I went to the closest AT&T sore I could find in order to try to get some information.

I removed the modular battery to demonstrate to the employee that it was a modular piece so I could get an opinion on if I could just replace the component but when I slid the battery back into the phone and tried to turn it back on I noticed that it would not power on at all. I even took it back home to put it on the charger hoping that I would at least get a charging notification but alas, blank screen.

I have since tried removing and inspecting the battery but I can see nothing out of the ordinary though I am no expert either.

I am not certain if it is important to mention that I removed the battery while the phone was still on but I have done so before and it booted right back up no problem.

To recap here, took the phone for a SWIM and it still worked. But removing the MODULAR battery completely left me with a useless brick.

I am posting this in hopes of getting some insight from perhaps an expert or just so one who has maybe been through a similar experience, I am wondering if maybe replacing the battery will fix my problem since all of these problems appear to be centered around the battery. however I don't really want to spend money if I don't have to either so any advice would be greatly appreciated.