Honestly, grab the Vello BG-C10 Battery Grip for Canon 70D/80D/90D. It is a decent option that fits your budget and wont fry your gear. I use one and it works fine.

Wait, are you shooting video or just using the screen a lot? That 90D eats power if youre not using the viewfinder. I tried the Neewer Vertical Battery Grip for Canon 70D 80D 90D and was pretty bummed. It just felt like cheap plastic.

• Neewer: Super cheap, feels fragile tho.
• Vivitar Battery Grip for Canon EOS 70D 80D 90D: Better texture, but the dial is stiff. None of these feel like the real thing unfortunately...

Re: "Wait, are you shooting video or just using..." - honestly you should look at the Meike or Pixel grips if you want something that won't fall apart mid-wedding. I have been using Meike for years on my backup bodies and they are solid for the price. They feel much closer to the Canon build than those super cheap Amazon brands. If you want reliability on a budget, check these out:

• Meike MK-80D Professional Battery Grip for Canon 70D 80D 90D
• Pixel Vertax E14 Battery Grip for Canon 70D 80D 90D The Meike is usually around 50 or 60 bucks and the rubber grip doesnt feel like itll peel off after a week. Just make sure you actually have enough batteries to fill it. Since you mentioned the battery dying fast, maybe look at a Wasabi Power Battery 2-Pack for Canon LP-E6N to supplement what you have. The grip is only useful if you have the extra cells to put inside it. For a wedding you definitely want at least four batteries total in your bag just in case.

Late to the party but I gotta chime in because I've been burned by cheap grips way too many times. I once used a budget grip during a graduation shoot and the shutter button just stuck mid-press. It was a total disaster. Honestly, most third-party ones feel like hollow plastic toys compared to the real thing, which is a real bummer when you're shooting something as important as a wedding. Before you spend the cash tho, are you using the actual Canon LP-E6N Lithium-Ion Battery or generic ones? If the batteries are old or off-brand, a grip won't fix your power issues. Some comparisons from my gear graveyard:

• Phottix BG-80D Battery Grip for Canon 70D 80D 90D feels a bit more solid than Neewer but the dials still feel mushy.
• The generic DSTE grips you see online are a gamble, I had one that drained my batteries overnight while the camera was off. Quick tips for the big day:
• Turn off your LCD screen and stick to the viewfinder as much as possible.
• Set your Auto power off to 1 minute so it doesn't stay awake while hanging on your strap. I really wanted to like the cheaper alternatives, but they just never seem to last as long as they should.

Same boat, watching this

I am dealing with the exact same power struggle! The Canon EOS 90D Body is absolutely fantastic, but it drains the Canon LP-E6N Lithium-Ion Battery way too fast during long shoots. I love the performance but official prices are insane!! Cost considerations I am facing:

• Extreme OEM price inflation
• Searching for certified refurbished deals
• Balancing gear safety with savings Its honestly a total nightmare trying to save cash!