Saft LS14250 - 3.6 Volt Primary Lithium 1/2 AA Battery - NSN 6135-01-669-4691
Let's Talk Batteries! Probably the Most Confusing Topic--But Most Important! - Fenix Store
PALO 100% Original 1.5V Li ion AA Rechargeable Battery 3400mWh AA Lithium ion Battery 1.5V AA battery With Battery Case|Rechargeable Batteries| - AliExpress