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Surefire SF123a pack of x6 Batteries | Tactical-Kit
     

SureFire Lithium batteries CR123A Batteries - Optimized for use in SureFire flashlights, SureFire Lithium batteries pack a lot of power into a 10px package. And unlike alkaline batteries SureFire High-Performance Lithium Batteries boast a ten-year shelf life, which means they will be ready when you need them, every time.

Surefire non-rechargeable flashlights and weapon lights use these lithium batteries because of their advantages over alkaline batteries. These advantages are:

Shelf Life — At room temperature, lithium batteries can be stored 10 years and still supply about 70% of their power. Alkaline batteries have a significantly shorter shelf life.

Temperature Tolerance — Lithium batteries function over a wide temperature range (-60° to 80°C, or -76°F to 176°F), although power is reduced at the extremes. In contrast, alkaline batteries function poorly below freezing and at higher temperatures. The temperature tolerance of lithium batteries also benefits their shelf life. Storing alkaline batteries at higher temperatures can kill them in a few months, but lithium batteries stored for years at similar temperatures can still function effectively.

Power Density — For a given size (volume), lithium batteries produce much more power than alkaline batteries. For example, given same-sized batteries and the same power load, it would take about 2.5 alkaline batteries to match the power output of one lithium battery.

Weight — For a given size (volume) lithium batteries weigh about half as much as alkaline batteries. For example, an alkaline battery the size of a SureFire SF123 battery would weigh about twice as much.

Voltage — Terminal voltage for lithium batteries is 3 volts compared to 1.5 for alkaline batteries.

Voltage Maintenance — A lithium battery maintains fairly constant voltage for up to 95% of its life, depending on discharge rate. At moderate to high discharge rates, alkaline battery voltage drops rapidly due to internal battery resistance, which wastes power. The large reaction area provided by a lithium battery’s wound-plate construction provides very low internal resistance, ideal for high current loads.


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