SureFire non-rechargeable flashlights don't use ordinary AA, C, and D size alkaline batteries. They use disposable 123A lithium batteries because of their multiple advantages over alkalines — longer shelf life (10 years), higher power density, higher unit voltage (3 volts), lighter weight, better cold weather performance, and better voltage maintenance. Read More. SureFire's custom-engineered rechargeable batteries use time-tested Nickel-Cadmium technology. Coupled with our Rapid SmartChargers you'll get reliable performance and hundreds of charging cycles from your battery.