A7ii vs a6400

In my case it doesn’t really apply, not worried or interested in IBIS or OSS lenses. I turn the IBIS off on my a57 anyway. Im smooth with video and use tripods. Plus I just cant afford $500 more before xmas lol.

But the 6400 battery is at least 20% better than the original 6000/6300 battery. Im sure the 6600 is even better.

You are right, batteries had the same capacity but the cameras themselves were updated internally to be more efficient. So if you set a 6300 to record HD video it will be dead 10-15 minutes sooner than a 6400 and 6500. Id bet the 6600 has the same improvements on the boards as the 6400 but a bigger mAh battery.

DrBrown54 wrote: You are right, batteries had the same capacity but the cameras themselves were updated internally to be more efficient. So if you set a 6300 to record HD video it will be dead 10-15 minutes sooner than a 6400 and 6500. Id bet the 6600 has the same improvements on the boards as the 6400 but a bigger mAh battery.

Also obviously a fresh battery that comes with a new camera holds the charge better than one that has been used for a while.

Although I have no real experience with α6600 (apart from quickly handling at a shop), at least with α7R III the beefier NP-FZ100 is vastly better than NP-FW50 and somehow I feel it is even better than the old NP-FM500H used in most Sony A mount cameras. Of course, it may not be totally fair to compare different battery types and different cameras, especially when some are clearly older technology.