So basically the consensus is that cheap third-party grips and your heavy Canon EF 100-400mm f/4.5-5.6L IS II USM lens just dont mix well. Since youre being cost-conscious, honestly just look for a used Canon BG-E16 Battery Grip online. Youll get the magnesium build and weather sealing for way less than retail. Quick tip: check the mounting screw for any play before shooting! gl 👍

oh man, I totally feel u on this. The 7D Mark II is basically a tank, and that weather sealing is legit. Since you're rocking a heavy setup like the Canon EF 100-400mm f/4.5-5.6L IS II USM, the grip becomes a structural point, not just a battery holder. Unfortunately, I've had some pretty bad experiences with third-party stuff. I tried to save money with the Neewer BG-E16 Replacement Battery Grip, but it was *not* as good as expected. The plastic felt cheap and it actually flexed when I was tracking birds... super sketchy. Here is what I recommend:
* Canon BG-E16 Battery Grip: Honestly, just bite the bullet. It's the only one with the magnesium alloy frame and proper gaskets to match the body. * Vello BG-C12 Battery Grip for Canon 7D Mark II: If you're really strapped for cash, this is the best of the "cheap" ones, but it still lacks the pro feel of the original. Tbh, id just look for a used official one on MPB or Keh... gl! 👍

Quick reply while I have a sec... If you are looking at alternatives, you might want to consider the Pixel Vertax E16 Battery Grip for Canon 7D Mark II. I have done some teardowns on these and the internal traces are actually decent, tho the shell is definitely not magnesium like the body of your camera. One DIY tip for that heavy lens setup: check the mounting screw for any side-to-side play before you head out. If it feels loose, I usually suggest adding a tiny washer or a thin rubber shim to the base. It prevents the grip from twisting when you are tracking wildlife with that heavy glass. Also, be very careful with the battery tray latches on these third-party units. They can be brittle, so dont force them if they feel stuck. For the power issue, you could also look into the Canon LP-E6NH Lithium-Ion Battery. It has a higher capacity than the N version and holds up better under the high-speed drive mode of the 7DII. Just make sure the grip contacts stay clean with a bit of isopropyl alcohol so you dont get any weird power drops mid-burst.

Seconding the recommendation above. That 100-400mm is a serious piece of glass and it puts a lot of stress on the mounting point. I actually went through this a while back. I tried to save money with a generic brand because the official one seemed overpriced... but it was honestly a mistake. The plastic felt thin and it started creaking under the weight of my kit. I was worried the screw might fail during a vertical shoot. Before you buy anything, I have two clarifying questions:
1. Are you planning on shooting in heavy rain or just dusty environments? Third-party sealing is rarely as robust as the camera body itself imo.
2. What is ur actual budget range for this? Anyway, my lesson learned was that structural integrity matters more than the extra battery juice. If youre using heavy lenses, safety is the priority! 👍

Noted!

Tbh i spent a lot of time analyzing the teardowns and material specs for these grips because i was curious why the price gap is so massive. basically the OEM Canon units use a magnesium alloy internal frame which matches the 7DII chassis while almost all third-party ones use high-impact ABS or polycarbonate. Even if they feel stiff at first the coefficient of expansion and the way they handle torque from a heavy 100-400mm lens is just different on a structural level. I’ve seen data suggesting the weather sealing gaskets on the third-party units arent always rated to the same IP standards as the body itself which is a huge risk if you’re out in the elements. I also noticed that some of the cheaper PCB designs in the aftermarket grips dont always handle the high-speed data bus of the 7D2 perfectly, which can sometimes lead to slight lag in the AF-ON button response. Quick questions to narrow this down for you: are you more concerned about the frame rate stability during 10fps bursts or is this strictly an ergonomics thing for you? Also, do you strictly use the LP-E6N or are you planning on using the AA battery magazine at all?

Same setup here, love it

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@Reply #7 - good point! That combination is essentially the sweet spot for wildlife. I have been very satisfied with the results using the Hahnel HC-7D II Battery Grip for my setup. From a technical standpoint, the Hahnel internals are quite impressive; the circuitry handles the high-speed signaling for the 10 fps burst rate without the communication errors you sometimes see in cheaper clones. The build uses a reinforced mounting plate that helps distribute the weight of a heavy lens like the Canon EF 100-400mm f/4.5-5.6L IS II USM more effectively. To maximize your uptime, I suggest utilizing Canon LP-E6NH Lithium-Ion Battery packs. These newer 2130mAh cells provide significantly better endurance than the standard batteries, and the 7DII properly recognizes the battery health data through the Hahnel interface. It is a very reliable middle ground if you want to avoid the high OEM price tag but still need professional performance.