Carbonating Beverages: Their primary function is to carbonate drinks using a soda siphon. You simply fill the siphon with water or another beverage, screw in a CO2 charger, and press the lever to infuse your drink with bubbles. It's a great way to make fresh sparkling water, flavored sodas, or add fizz to cocktails.

Inflating Equipment: CO2 chargers can also be used for inflating bike tires, paintball guns, or other pneumatic equipment. They offer a quick and portable way to top up your pressure, though some equipment may require specific adapters.

Food Preparation: CO2 chargers can be used with tools like cream whippers to create whipped cream or aerate mousses and soufflés. However, be aware that these are different from nitrous oxide chargers, which are not safe for food preparation.

Other Uses: Less common applications include powering pellet guns, certain paintball markers, and even some scientific experiments.

Important Note: Always check the instructions of your specific device to ensure it's compatible with CO2 chargers and to find out the recommended charger size.