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Batteries ability all kinds of devices, from toys and electronics to life-saving medical devices. Some devices, like laptops, utilise batteries designed specifically for that model, in which case you may take to refer to the user transmission to detect out exactly how to modify it. However, other devices utilise more than common battery types, including AA, AAA, C, D, 9V, and push button styles. Fifty-fifty if you've never changed a bombardment, it's an piece of cake task you can do yourself!

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  1. 1

    Examine the device for a small-scale bombardment symbol or a plus and minus sign. The bombardment compartment on a device tin can be almost anywhere. It's normally on the back or the bottom, and so check these places offset. It may be marked with a small-scale battery-shaped symbol, or yous may see a plus or minus sign, indicating the polarity of the battery.[1]

    • These markings may exist on the tiptop or just to the side of the compartment door.

  2. 2

    Look for a compartment that slides off if there is no symbol. If you lot don't run into any markings, you may be able to locate the compartment by finding a slice that slides or snaps off of your device. Expect for lines in the case that don't match the other seam.

    • Yous might also encounter a clasp or a lever that will release the compartment door.
    • The battery compartment may besides exist held shut by i or more minor screws.

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  3. 3

    Check the user transmission if y'all're not sure where the compartment is. If yous have the instruction manual to your device, it should have a diagram showing where the batteries should get. If you don't have the transmission, you lot may be able to find one past searching for your device online.

    • If yous're looking online, make sure to include the brand name and model number, if you know it.

  4. 4

    Remove any screws property the compartment shut. Commonly, the screws in a bombardment compartment are Phillips screws, pregnant they have a cross-shaped dip in the head. To remove these screws, utilise a Phillips-head screwdriver with a cantankerous-shaped tip.

    • If the screw is stuck, you may be able to remove it using a spiral extractor.
    • In the case of a watch bombardment, you may need to apply a special tool to remove the dorsum of the watch.

  5. v

    Await at the compartment door to determine what size battery you demand. Usually, the battery size will be printed on the compartment door. If not, the information may be located within the compartment. If it's not listed, you lot might take to estimate the size of the bombardment, or try unlike sizes until yous discover the one that fits.

    • AAA, AA, C, and D batteries are all 1.5V batteries, but the different sizes produce dissimilar currents, or the amount of power that comes out of the battery at once. AAA is the smallest traditional one.5V battery, and is commonly used to ability small electronics. D is the largest i.5V battery and ordinarily charges larger items like flashlights.
    • A 9V battery looks like a minor box with snaps on tiptop, and information technology's oftentimes used to power devices like smoke detectors and walkie-talkies.[2]
    • Coin and push button batteries are small and round, and they're used to power very small-scale devices like watches, hearing aids, and computer components.[iii]

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  1. 1

    Expect for a plus symbol on your battery. The polarity of batteries is what helps them supply current to a device.[iv] The plus sign, or +, indicates the positive terminal. On AA, AAA, C, and D batteries, the positive end should be slightly raised.[v]

    • The negative end of the battery should exist flat, and it may or may not be marked with a minus, or -, symbol.

  2. 2

    Notice the positive and negative symbols on your device. There should be a plus and minus sign inside the battery compartment. This volition tell you which direction the battery needs to go.[six] The negative end may have a spring or a small metal lever.[vii]

    • If the polarity isn't marked on your device, you may need to consult the manufacturer's instructions.

  3. 3

    Align the symbols on the battery with those on your device. It's very important to make sure that each battery is properly aligned within the device. If your battery faces the wrong style, it could crusade your device to malfunction, or it could fifty-fifty cause the batteries to leak dangerous corrosive chemicals.

    • The plus sign on the battery should friction match the plus sign on the device.

  4. 4

    Slide the bombardment into place with the negative end first. Every bit you insert the negative finish of the bombardment, you may press downwardly a spring or a lever. By installing the negative terminate first, the bombardment will slide into the compartment more easily. You lot should then be able to easily snap the positive finish into place.[viii]

    • The positive end of the battery should snap into place with a gentle push.

  5. 5

    Cheque the alignment of every battery. If you lot have multiple batteries side-past-side, they may alternating directions. This creates a series of current that amplifies the energy produced by the batteries. Make sure each battery faces the direction that's indicated in the bombardment compartment or the user manual.[9]

    • Some devices that employ multiple batteries may proceed to function if one bombardment is installed incorrectly, but yous can damage the device or shorten the life of the batteries by doing then.

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  1. i

    Look at the snaps on top of the 9-Volt battery. A 9V battery is small-scale and square, with ii snaps on the meridian. One is a male connector, and the other is female person.[10]

  2. ii

    Line up the snaps on the battery with those inside the device. Inside the battery compartment on the device, you will see two snaps that resemble the ones on top of the battery. The male person connector on the bombardment should align with the female connector on the bombardment compartment, and vice versa.

    • It volition be very obvious if you effort to put in a 9V battery incorrectly, every bit the connectors volition bump against each other and the battery won't snap into place.

  3. three

    Hold the bombardment at a 30° angle and slide the connector side in outset. In one case y'all've lined upwardly the snaps, tilt the 9V battery slightly. Push the top of the battery in until the snaps are touching, then press downwardly on the battery so that it snaps into identify.[11]

    • These types of batteries tin can be a little hard to install sometimes. If information technology doesn't get in the first time, try again with a little more force.

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  1. ane

    Examine the face of the battery for a + symbol. Money and button batteries are small, flat, and circular. Money batteries are flatter, while push batteries commonly accept a smaller circumference. The top of the battery is normally etched with the battery size.[12]

    • Unremarkably only the positive side of the battery is etched. The negative side might not take any markings at all.
    • In some button-manner batteries, the positive side is slightly raised.

  2. 2

    Check the device for a positive symbol. Your battery compartment may be marked with a positive symbol, particularly if there is a door or a slide-out mechanism where y'all should put the battery. Nevertheless, if you had to pry off a encompass, in that location may non be a marker indicating which management the battery should go.[13]

    • In the case of devices with a battery door, such as a hearing help, you may find information technology difficult to close the compartment if y'all put the bombardment in astern.

  3. iii

    Insert the battery with the positive side facing up unless directed otherwise. If yous don't see any markings on your device, you should assume that the positive side of the battery should be face-up.[14]

    • If you're installing a coin cell battery on a estimator'southward motherboard, for example, in that location may not be any markings to indicate which fashion the battery should go, just the positive side should face upward.
    • If you're still not certain, consult the device's user transmission.

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  • Always double-check that your batteries are installed correctly. Improper battery installation could lead to the battery leaking or rupturing, which can event in dangerous exposure to corrosive chemicals.

  • Never store batteries in your pockets or purse, as they may leak.

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