CR2 batteries are a unique size and voltage, so it's important to use the correct replacement. Some devices may accept batteries labeled as DLCR2 or ELCR2, which are compatible with CR2. However, always check your device's manual to confirm compatibility before using an alternative. Using an incorrect battery type can affect performance or even damage the device. If you're unsure, bring your old battery or device information to the store, and a Walmart associate can help you find the right match.

The term "CR2" refers to a specific battery size and chemistry. The "CR" stands for lithium manganese dioxide, which is the type of chemical used inside the battery. The "2" indicates the battery's size and shape, which is shorter and wider than some other lithium batteries. CR2 batteries are 3 volts and are commonly used in small electronics. Always match the battery code to your device to ensure proper fit and function.

CR2 batteries are popular in a variety of small electronic devices. You’ll often find them in:

• Photo cameras and flashes
• Golf rangefinders
• Alarm systems
• Bike lights and flashlights
• Certain smart home sensors

Always check your device’s battery compartment or manual to confirm if it requires a CR2 battery, as using the wrong type can impact performance.

The lifespan of a CR2 battery depends on how often and in what type of device it's used. In devices with low power draw, like some sensors, a CR2 battery can last several months or even longer. In high-drain devices, such as camera flashes, the battery may need to be replaced more frequently. For best results, store unused batteries in a cool, dry place and remove them from devices if you won't be using them for an extended period.

Most CR2 batteries are designed for single use and are not rechargeable. However, there are some rechargeable CR2 batteries available, but these are specifically labeled as such and require compatible chargers. Never attempt to recharge a standard, non-rechargeable CR2 battery, as this can be unsafe. If you prefer rechargeable options, make sure your device supports them and follow all manufacturer instructions for safe use.