Typical AA battery
Many consumer electronics nowadays use rechargeable batteries, so you don't need to spend money and resources replacing the batteries every few weeks. However, some electronic devices still operate with single-use batteries. Many different types of single-use batteries are out there; here's identify and learn to replace them.
Safe Battery Removal
Find and open the battery compartment. There should be a small latch you can pry open, and there should also be a marking on the exterior of the battery compartment to let you know where to lift to remove the cover.
Inspect the battery/batteries for potential damage. If a battery cover has broken or begun to leak, you will see what appears to be hard greenish-white foam around the battery or on the compartment around it. If this has happened, do not touch the battery or the white substance. This is acidic, and may injure your skin. Use a paper towel or rubber glove to protect your skin as you remove the battery.
Determine which is the positive end of the battery. Typically a small, round piece of metal will protrude from the positive end of the battery, whereas the negative end of the battery will be flat and pressed against a coiled spring in the compartment. There will be a little plus sign beside the positive end, and a minus sign next to the negative end.
Press on the positive end so that the aforementioned spring is pushed back. This will allow the battery to pop out of the compartment.
Battery Replacement
If the battery you just removed leaked onto the battery compartment of your electronic device, you should scrape away any excess white substance before you replace the battery with a new one.
Somewhere on the side of the battery, it should indicate what type of battery it is. The most common replaceable battery types include AA, AAA, C-cell and D-cell. Get a replacement battery of the same size.
Look for the coiled spring in the battery compartment of your device. Press the negative end of the battery to the coiled spring, and push against the spring until the battery fits into the compartment. Make sure the compartment lid can close safely over the battery.
If your electronic device does not work after you have replaced the battery, it may have been damaged by the old battery leak.
Safe Battery Disposal
California mandates recycling for nearly all battery types, and many other states have new regulations in place about battery disposal. View the Environment, Health and Safety website in the resource links below to find a site near you that will recycle your batteries safely.
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