So I just got this Canon Rebel T7 and I'm really worried about the battery dying because I'm supposed to shoot my cousins outdoor wedding next month in Vermont. It's gonna be a super long day and I don't want to keep swapping batteries every hour and maybe miss a shot. I keep seeing these battery grips online and they look cool because you can hold two batteries at once but I'm honestly so confused.

Like I saw some on Amazon that are cheap but then I read somewhere that the T7 doesn't even have a real grip made by Canon? Is that true? My logic was that if I buy one it will make the camera bigger and easier to hold too because my hands keep cramping up during long sessions. I found this one by Neewer and another by some brand called Vivitar but they have these weird little cables on the side and I dont know if thats normal or if I'm gonna break my camera plugging random stuff in. Im on a bit of a budget like maybe $60 max since I spent all my money on the camera itself and a new lens. Does it matter which one I get or are they all basically the same plastic box? I just want something that wont melt or stop working halfway through the ceremony...