I found some more ancient batteries in an ebay purchase.

[rivetmaster]

There's no date on these. They have leaked slightly. They're from Australia. Has anybody ever seen this brand before?

 

[blu_fuz]

It's kind of neat to see these old batteries. Obviously I wouldn't want to find them in my boombox, but still.

 

[Reli]

Four AA's, really? For what, an alarm clock? Should only need 2 at the most.

 

[floyd]

Four AA's, really? For what, an alarm clock? Should only need 2 at the most.

Those Double A's are probably extra battery for the memory backup.
The battery compartment for the d cells look like it takes at least 8 or 10 batteries

 

[Superduper]

I found this inside a transistor tester a few days ago that I haven't used or even looked inside of for at least 20 years. I'm pretty sure it's a plain carbon zinc battery. To be honest, I forgot that these testers even needed batteries. I was expecting to need to pry the battery out but luckily, there was absolutely no signs of corrosion or leakage. Not sure if they behave differently than modern alkalines, but I sure appreciate that it didn't leak. Modern alkaline cells will begin to leak almost the day after they drain down. Not really some obscure brand here but definitely not something you can buy at your local store, which the battery departments are all dominated by duracell and energizer. Not even sure if they really are in business anymore either and this cell even says "not for retail trade." Does that mean it was present in the tester from when it was supplied new? Because that tester must be at least 30 or 40 years old.