How do Energizer e^2 lithiums output 1.5V?

Does anyone know how they do this? I thought lithium technologies did 3.7V. Is this some other chemistry or is there a little buck converter stuck inside a AAA?

The Energizer lithium cells are not the 3.7V rechargeable cells. They are 1.5V disposeable lithium cells.

Energizer's wesite has an applications manual for them. They use Lithium Iron Disulfide which produces 1.5V instead of Lithium Manganese Oxide in 3V coin cells.

They have a current-limiter inside to stop them from catching on fire when they are overloaded.
The current limiter is 1.5A for the AAA cell and is 2.0A for the AA cell. Pulsed current can be higher without tripping the current-limiter which is heat-activated.

Cool, thanks. I searched for lithium iron disulfide and found out about a lot of chemistries I didn't know about.