3 Things You Can Make From 9v Batteries

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Introduction: 3 Things You Can Make From 9v Batteries

About: Innovative Projects, Diy's, Life Hacks

Next time you plan to take your jar full of batteries to a recycling point, salvage the connectors from 9v batteries.

In this Instructable, we will look at 3 things you can make from 9v batteries.

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Step 1: Snap Button

If you need a snap button, but you don't have one, look into your battery bin.

I wanted to add a snap button to a fake leather sleeve.

I opened a 9v battery to remove the connector.

Step 2: Snap Button

I drilled 4 holes in the plastic and cut it in half.

Step 3: Snap Button

I sewed the battery connector buttons to the sleeve.

Free snap buttons from an old 9v battery

Step 4: Battery Connector

If you need a battery connector, but you don't feel like going to the shop, you can make one.

Remove the connector from an old battery and solder 2 cables to it.

Step 5: Key Holder

You will need a few 9v batteries.

I used a piece of decorative stone to glue 3 battery connectors on top.

Step 6: Key Holder

I also glued 2 connectors together

Step 7: Key Holder

When the glue was dry, I drilled a hole in the connector and attached it to the keys.

As you can see, I made another one for my car keys.

Step 8: Key Holder

Now we have a fancy key holder.

You can also put keys on top of each other.

You can go one step further and make a battery coat hanger.

It's better not to use a real battery as they tend to leak.

You don't want the acid to end up on your clothes or skin.

Open the battery, fill it with something and put it back together.

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    206 Comments

    Put two 9 Volt batteries together to make a nice hand warmer. It works well.

    SOME GOOD IDEAS , I KEEP MY SPARE 9V BATTERIES IN A LARGE PILL CONTAINER (THE TYPE THAT PILLS COME IN) STANDING UPRIGHT , YOU CAN PUT 3 NEW BATTERIES IN 1 CONTAINER AND AFTER YOU SCREW THE CAP ON THERE'S NO WAY THEY CAN START A FIRE EVEN IF THEY ARE TOSSED IN THE JUNK DRAWER !

    1 reply

    the small pill bottles 3 aaa batteries, or 2 AA , for travel use one for quarters, one for Q tips, one for toothpicks., other small things, most are water proof

    Interesting ideas, thanks for posting.

    user

    What kind of glue will hold up to the stress of pulling on these key rings?

    1 reply

    Nice looking projects.

    Cute ideas, but NEVER- EVER EVER mix old 9v batteries together in a bag or a box without insulating the electrodes! It's a good way to start a bad fire! Even if there's a little charge left there can be enough to heat up. House fires start that way.

    http://www.kctv5.com/story/24594124/kctv5-exposes-the-9-volt-battery-fire-danger

    2 replies

    Back in 1970s, electronics kits were sold with cubes containing components and jumpers. By placing these cubes into base so that contact pads on their sides interconnected, one could quickly build simple circuits. Kits were powered by 9V batteries held inside base, and instruction manual said that by building a wrong circuit that short circuits the battery, it is possible to quickly drain it. No mention of fire or even overheat. That's because 9V batteries were only carbon zinc in 1970s. The only way to start a fire with such a battery was using steel wool, and even that not always helped. Nowadays they are alkaline, and some are even lithium. These are much more dangerous. They can catch fire themselves when shorted, and steel wool is not necessary.

    I think these are neat ideas..it is just amazing how some people can just look at something and find different ways to use them!!! ;)

    This one sounds useful

    awesome.. never thought of this..

    love the key holder i'm gonna try this out !

    You can buy those 2-part snaps at the fabric supplies store for about $2.50 per 10 sets. That would obviate the necessity of opening a battery, and exposing its' toxic, heavy-metal contents to the environment, rather than recycling that battery properly as you are probably aware you should. Is that nice enough?

    3 replies

    A typical 9V alkaline battery has inside... six 1.5-volt LR61 cylindrical cells in series. You can "upcycle" the connectors or casing and still recycle the cells, no big whoop.

    Thanks for letting me know. See? I learn something new every day!

    What heave metals?? Please tell me the chemistry of a 9 volt alkaline battery.

    Are 9 volt batteries sealed?? With what material?

    When you toss them don't the toxins get exposed anyway after the steal case rusts??