honestly, i think the biggest factor for endurance isnt just the mah rating, but how the gimbal handles the power distribution to the camera. ive seen people try to daisy-chain power banks to their a6600 through the gimbal port, but im always a bit WARY of that because it can cause some serious overheating or even fry the board if the voltage isnt perfectly regulated, you know? iirc some of the larger professional-grade grips have much better reliability for long days, though i dont know the exact runtime off the top of my head. basically, if youre looking for pure longevity, you gotta prioritize a setup that lets the gimbal motors breathe. if the rig is too heavy or poorly balanced, you're gonna lose hours of shoot time regardless of what the spec sheet says. i always tell people that keeping the stress off the motors is way more important for a reliable day of shooting than just having a massive battery. dont forget that using those cheap dummy batteries can be a bit sketchy for the a6600s internals too, right?

Before I drop a list, what kind of lens setup are you running? If you are using heavy G-Master glass, that changes the math on motor strain and power draw completely. From a market research perspective, if you want to avoid the DIY power bank setups mentioned earlier, you should look at gimbals with swappable high-capacity grips or superior internal power management. Here is how the top brands compare for endurance:

• DJI RS 3 Pro with the DJI RS BG70 High-Capacity Battery Grip. This combo is basically the gold standard for uptime. The grip alone is rated for up to 29 hours, which is overkill for an a6600 but perfect if you never want to worry about swaps.
• Moza Air 2S. This unit is a powerhouse in terms of raw runtime. It features a built-in 3200mAh battery that handles the a6600 payload very efficiently, often hitting 20 hours in real-world professional tests.
• FeiyuTech SCORP-2. Feiyu has improved their motor efficiency significantly lately. This model supports 18W fast charging and can actually power the camera via the USB-C control port more reliably than some other entry-level brands. So basically, if budget isnt the main hurdle, the DJI ecosystem with the extended grip is the most reliable way to go. Just watch out for the total weight if youre shooting handheld all day. Any idea what your total payload weight is?

Honestly, I’ve been looking into this quite a bit since I didn’t want to drop a fortune on gear. I’m still pretty new to the whole gimbal world, but I’ve been trying to squeeze every minute out of my a6600. Tbh, the realistic runtime on the Zhiyun Weebill 3S is usually around 8 or 9 hours if you’re actually moving a lot — the 11.5 hour claim feels like it's for a perfectly balanced, static setup. I found a few ways to keep costs down while boosting battery: • I use a basic Anker Power Bank and just velcro it to the gimbal handle. It's way cheaper than buying extra proprietary battery grips.
• Some gimbals like the Feiyu SCORP-C are pretty budget-friendly and actually let you charge the camera via the USB-C control cable while you're shooting.
• Make sure your balance is perfect - like, really perfect. If your slightly off, the motors eat battery so fast, basically cutting your shoot time in half. I'm still figuring out the technical side, but has anyone tried using a dummy battery setup with these? I'm worried the extra cable might mess with the stabilization.

Interested in this too

DJI RS 4.