Anyone ever see a battery top like this? Ideas for the cause?

[Thrasher]

As per the article- alkaline batteries are at 1.5 volts, most devices stop working at 1.3 ish. This is just a common regulator chip.
www.eevblog.com/2015/06/07/the-batteriser-explained/

Cool idea filled with marketing bs

 

[Kemosabe]

I see markings that are very similar to what was found at Roswell. I believe these are actually batteries made by ancient aliens, that were dug up and re-wrapped and marked as 60amp 3,000mAh batteries.

ancient aliens? baghdad battery! they had some killer vapes back then.