Inside Another 9 V Battery

A long time ago, I discovered some quasi-AAAA cells inside 9 V batteries:

Inside a batteries.com 9V battery
Inside a batteries.com 9V battery

It occurred to me that I should dismantle a defunct Rayovac Maximum 9 V alkaline battery from the most recent batch (*) to see what it looked like:

Rayovac Maximum 9V battery - interior
Rayovac Maximum 9V battery – interior

Surprise!

A closer look at those pancake cells:

Rayovac Maximum 9V battery - detail
Rayovac Maximum 9V battery – detail

They look like separate cells bonded into a stack, although there’s no easy way to probe the inter-cell contacts; the leftmost cell probably died first.

(*) Which has apparently outlived the Rayovac Maximum brand, as they don’t appear on the Rayovac site.