Make Your Own Rechargeable Battery





Introduction: Make Your Own Rechargeable Battery

About: Thank you instructables!!

Batteries. Needed for just about every electronic project, electronics revolve around them. But think about it, What happens once they lose their power?We throw them aside. These batteries are building up in our landfills, so I set myself to find out how to reuse them.This project is very environmentally beneficial, as it takes a dead battery and turns them into a new one, preventing the creation of electronic waste. The possibilities are endless on this concept (stronger batteries, tiny batteries) and just think of what it would be like if everyone on this planet was able to recycle old batteries.Just we need the electronic waste to be turned into a new battery.The batteries are very small, and to power bigger things, You may need to make more and connect them.This can be called the second version of DIY Battery. But this one is rechargeable and is made from waste just like the earlier one .

Step 1: Waste Required to Make This Battery

For this you need :-

  1. old discarded AA sized batteries (2x)
  2. small container
  3. precious water
  4. a pair of pliers
  5. alum crystal
  6. Wires
  7. salty water

Only these things are required to make this .

Step 2: Strip Off the Cell

Take dry cell and strip it off as shown in the figure . Don't use fire because it can cause explosion. From this we don't just need the carbon rods but also we need the manganese dioxide found as black powder in dry cells.

Step 3: Taking Out the Carbon Rod

Use pliers to take out the carbon rod from the center of the dry cell.Once its off, you will see the top of the carbon rod, slowly pull until the carbon rod is out.we don't need only one carbon rod so, we have to open two dry cells and hence we will obtain two carbon rods.Most of the dry cells they consist of a Carbon Rod (what we need) surrounded by moist electrolyte paste.

Carbon rods will act as anode and cathode not alone but coated along with manganese dioxide .

Step 4: Taking Out Magnesium Dioxide

Use a battery that don't indicates that it is alkaline instead use the ordinary 1.5 v dry cell . DON'T USE ALKALINE BATTERY .Carbon Zinc is much safer to get the MnO2.....

Alkaline Manganese has about 11% KOH concentration which really hurts your fingers.. and if you get it into your eyes, it could blind you.... I got something of it onto my fingers and it hurted them ! ;).That worked really good! I need to get some carbon fiber cloth to try the formula out on. The increased surface area should really help. I did some research about taking apart an alkaline battery to get the MnO2 and decided that a cheap carbon zinc was an easier and safer way to go. It is just messy.Don't throw the cell after taking out the carbon rod . Now pour the black powder on any smooth and clean surface . Wear gloves while doing this . We need a tablespoon of manganese dioxide which is to be coated on carbon rods .

Step 5: Coating

The carbon rods are already coated with mnO2 but we will coat it again to make our battery more powerful . You can see the difference between coated and not coated one in the picture . It is necessary for a battery to be made rechargeable .Don't forget to coat the carbon rods with charcoal.

Step 6: Inserting Electrodes

Drill a whole the size of the carbon rod so it fits snug. Place the carbon rod into one of the hole leaving about 1/2 an inch sticking out from the top.Repeat it for the other carbon rod.

Step 7: Joining Wires

Seal the two holes so no water can pass through. Also glue the two wires to the tops of the rods sticking out

The carbon rod is now +and - too. Just take two wires and connect them to the two electrodes . Use glue to make it water proof .

Step 8: Making Electrolyte.

Pour some water in container and then add some powder made from alum crystals to the water . Mix It properly . Don't make it saturated . The water should seem to be transparent . You can also mix some mnO2 to it . It will increase its capacity to be charged.

Step 9: Done!

The signal is very weak, But if you make more and connect them, you can make them stronger.

This is only a starting to make rechargeable batteries at home . This rechargeable battery will decrease the creation of waste by disposable batteries.

The voltage is : 0.933 v

It needs to be recharged for an average for 14 hours to charge fully .

It is just a step to prevent waste generation and hence reducing the pollution.

Please vote if you like !




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This doesn't seem very practical. Batteries can be made out of countless things, but few of them produce a useful amount of power. The article fails to mention which type of battery to dismantle and use.

There are some major differences between the various types of batteries on the market; alkaline is the most common, but carbon-zinc, nickel-cadmium and carbon-zinc are also sold. It can be hazardous to take these apart if you don't know what you are doing. The article mentions none of this, therefore it gets a fail from me.

7 replies

I had absolutely NO problem seeing that plain carbon batteries were used.... Also, if something like this is so dangerous to YOU, maybe you need to quit science and take up bird watching...

Maybe a 10-yr old kid isn't as brilliant as you, and hurts himself taking apart a battery which contains dangerous chemicals. Did that ever occur to you?

Electrolysis of water by the battery carbon rod is one of the main lessons when students are in the science class 6 or 7 (at least before the year 2000). If it is about fearing from a risk (instead of controlling it) the pure Hydrogen is more dangerous to blow up.

BOOHOO!.. Don't be such a wimp.. There is not ONE THING contained in any of this that is life threatening... A slight chemical burn which I doubt will occur, will teach a lesson.. Common sense will prevail next time...

That worked really good! I need to get some carbon fiber cloth to try the formula out on. The increased surface area should really help. I did some research about taking apart an alkaline battery to get the MnO2 and decided that a cheap carbon zinc was an easier and safer way to go. It is just messy.

Carbon Zinc is much safer to get the MnO2.....

Alkaline Maganese has about 11% KOH concentration which really hurts your fingers..
and if you get it into your eyes, it could blind you....
I got something of it onto my fingers and it hurted them ! ;)

Anyone tell about the range of the anode and cathode. maximum voltage accords the anode and cathode


How cAn i prevent magnesium dioxide from being washed Way by the solution

It's Manganese Dioxide not Magnesium Dioxide. They're to entirely different chemicals except Magnesium Dioxide doesn't exist but there is Magnesium Oxide. Manganese Dioxide is MnO2, but Magnesium Oxide is MgO2.

Where did you get that transparent amber container that looks like a 9v battery? I would like to get some.

1 reply

Thank you :) Actually we can recondition all batteries at home: very good way

Thank you Gregory ! :)

You haven't used total mno2 for this. And also you have did a good super capacitor not a rechargable battery. Because there is no reversable process and there is no rechargable ions in it. If u add Li polymer or Nickel or Lithium it will become rechargable battery. If u want more clarity visit my instructables - "Simple Super Capacitor" and Rechargable Battery- 1.5v with no cost".........

Good Job sir, The same It will work on 1.5 v also right, But I have 9v, 12v old batteries are there If there is any method while doing like this, Please kindly check & suggest me ASAP...

how to make it more powerful ??????

great project

can i place your project on my website.

i'm working on a website which is related to electrical projects.

i also mention your name.

plz reply

This is interesting. Thanks for taking the time to explain:)

Thinking your Alum crystal looks like this old deoderant crystal I got 25 yrs ago...sure enough, the "natural" alum crystal is actually postassium aluminum (chloride ?) and thus, when folks are tryinto to get away from aluminum in deoderants, they use these crystals, some don't know it's alum, even; and they are essentially putting on a more pure form of aluminum as there are no other slathers and creams or enzymes/oils to break down aluminum's potency and transmissability thru skin. Women should know what they are using; but we are neither told what nor why we should care. I would like to see a complete compendium listing all ingrediants in all their various names & terms & uses. I would also like to see the world launch a project to inventory and study all the plants, bark, roots, leaves, algae & fungus, to catalog the world's flora for the poor and subsistence peoples to know what around them is edible; what is nutritional; what is nutraceutical and how to prepare it for each proper usage, wouldn't you? It must be international effort on every type of terraine and waters to help all people, and it should be accompanied by well digging projects to give fresh water to every place that is a viable habitat for humans to farm or commerce safely. If only we could eliminate the human predators and war machines, we'd have a pretty nice little planet, eh?