X Trustworthy Source United States Environmental Protection Agency Independent U.S. Twist the cover of the battery compartment counterclockwise to unscrew. Coin and button batteries are small and round, and they're used to power very small devices like watches, hearing aids, and computer components. Locate the battery compartment on your spotlight.A 9V battery looks like a small box with snaps on top, and it's often used to power devices like smoke detectors and walkie-talkies.D is the largest 1.5V battery and usually charges larger items like flashlights. AAA is the smallest traditional 1.5V battery, and is usually used to power small electronics. AAA, AA, C, and D batteries are all 1.5V batteries, but the different sizes produce different currents, or the amount of power that comes out of the battery at once.Or, estimate the size of the battery and try different sizes until you find the one that fits. If it’s not listed, check the device’s manual. This video describes how you can replace the batteries on your LED flashlight. If it isn’t on your device, the information may be located inside the compartment. Why Are Rails Shaped Like That Practical Engineering. Usually, the battery size will be printed on the outside of the compartment door. Look at the compartment door to determine what size battery you need.
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