Fun with a few 9V batteries. (244 of them)
Why the open web links it
Demonstrates the effects of short-circuiting many 9V batteries, highlighting electrical safety and energy release.
Linked by 7 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including google.ca, hackaday.com, org.ru, halfbakery.com, physix.fr.