Building on the earlier suggestion, im honestly kinda disappointed people still risk their careers on these cheap knockoffs for weddings. I had a third-party grip literally lock up my shutter button during a ceremony once... it was a total nightmare. Unfortunately, those budget brands just dont have the reliability for a long wedding day. They feel hollow and the dials often skip. Instead of those, try to find a used Canon BG-E21 Battery Grip for EOS 6D Mark II online. They usually go for around $90 and wont let you down when things get heated. If you're stuck buying new, the Pixel Vertax D18 Battery Grip for Canon 6D Mark II is okay, but its still not as good as expected compared to OEM gear. Quick tip: Rub the gold contact pins with a microfiber cloth before you mount it to avoid connection drops. TL;DR: Hunt for a used genuine Canon grip; third-party stuff is way too risky for professional work.

ngl, I had a cheap grip fail on me once during a ceremony and it was a total nightmare... the dial just stopped responding. If you really want to save cash, maybe look at the Neewer Vertical Battery Grip for Canon EOS 6D Mark II but be careful with the battery tray. The buttons are okay but not as clicky as the official Canon one. Make sure those contacts stay clean or you might get power errors mid-shoot.

Honestly, weddings are high-stakes so you gotta be careful with cheap gear. I would suggest looking at the Vello BG-C14 Battery Grip for Canon EOS 6D Mark II if you want to stay under a hundred bucks. It handles better than the dirt-cheap brands, but make sure to tighten the wheel properly so it doesnt lose connection mid-shoot. Id avoid the bottom-barrel stuff for a gig this important.