What is inside of a 9 Volt Battery?

I've just realize that a 9V battery is an arrangement of 6 AAA (1.5V each) batteries. - 9GAG

Salvage 9V Battery Clips From Dead Batteries : 10 Steps - Instructables

Different Construction Methods of 9 Volt Batteries

Inside Another 9 V Battery – The Smell of Molten Projects in the Morning

Brian Roemmele on X: The secret inner world of the 9 volt battery. / X

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3 Cool Things about Old 9V Batteries - News about Energy Storage, Batteries, Climate Change and the Environment

9 volt की Battery के अंदर क्या होता है, What is inside a 9 volt battery ?, Battery inside view

Survival Tip: 9 Volt Battery into AAA Use

What is actually inside a 9V battery? - Quora