I’m not sure if co-mingling the batteries is a good idea because there’s a chance of shorting them out if another battery or two touch and short out the positive and negative ends of a battery. Most of the times it won’t happen but there’s always a chance it may because the majority of the surfaces of these batteries are metals.
I also heard that Costco batteries used to be from Rayovac but then I also heard that Costco batteries are no longer OEM from Rayovac since they’re switched to this new packaging, although nobody seems to know which new OEM supplies batteries to Costco now.
I get about 5 days of battery life out of them in my OPNs, and I direct stream a lot.
I do dislike the dispensing wheel of the current packaging, too. But if you have a hard time turning it one way, try turning it the other way. That seems to help a little from what I found.