Saw this earlier but just now getting a chance to reply. Honestly, im still a bit of a beginner and kinda paranoid about third-party gear frying my electronics, so ive been looking into this too. Before I suggest anything, are you using official Canon LP-E6NH batteries or third-party ones? That makes a huge difference for the accurate communication part you mentioned. One quick tip: check the weather sealing. Most third-party grips skip the rubber gaskets, so keep it dry. Especially at events where someone might spill a drink or if it starts to rain. Technically, the Meike MK-R5 Pro Battery Grip for Canon EOS R5 R6 R6II is a solid alternative because it includes a wireless remote for long exposures. Its much cheaper than the Canon version but seems to hold the batteries pretty securely. Just be careful with those seals if youre shooting outside... wouldnt want to risk the camera.

Ive been shooting for a long time and honestly, the Neewer BG-R10 Replacement Battery Grip for R5 R6 R6 II is decent for the price, but the shutter button feels a bit mushy. Id personally recommend the Vello BG-C18 Battery Grip for Canon EOS R5 R6 R6 II. It feels way more solid and the battery communication is actually reliable. The Neewer is fine on a budget, but Vello is much closer to the real deal.

I really wanted to save some cash because the official gear is crazy expensive, but honestly my experience with off-brand grips has been pretty disappointing. I picked one up thinking I was being smart, but it was a total disaster. The shutter button had zero tactile feedback and it felt like it was gonna snap off every time I pressed it. Worst part was the battery drain tho. It actually drained my batteries overnight while the camera was just sitting there doing nothing. I ended up returning it and honestly, it made me super nervous about shorting out the internal circuitry on a body this expensive. It sucks because the R6 II is amazing, but these third-party companies just dont seem to get the electronics right sometimes. Be careful because what seems like a bargain can end up being a massive headache if the battery communication keeps failing mid-shoot like mine did. I ended up just sticking with a bunch of spare batteries and a fast wall charger instead of risking it again with another cheap grip.

Following this thread

Just catching up on this thread. Honestly, the market for R6 II grips is pretty depressing right now. It is incredibly frustrating that Canon demands such a premium for the BG-R10 while the third-party landscape is such a lottery of subpar electronics. I have run some basic multimeter tests on several units and the voltage regulation is consistently disappointing... most of these generic boards just dont handle the high-speed data bus correctly, which leads to those communication errors people keep seeing. I had high hopes for the Meike MK-R5 Pro Battery Grip with 2.4G Remote because of the added functionality, but the housing tolerances were poor and it felt like the tripod mount was gonna fail under load. If you are desperate to save money, the Mcoplus BG-R10 Vertical Battery Grip is slightly better than most in terms of button tactile feedback. It actually feels like a physical switch rather than a mushy membrane. But unfortunately, the lack of proper weather sealing across all these brands is just a disaster waiting to happen if you shoot outdoors. It really sucks that we have to compromise on reliability just to avoid the Canon tax...