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Comments

[Harsh bhardwaj]

Hey but can you tell how to recharge them please answer as fast as you can
By the way thanks for this brilliant idea and please answer the question

[akibazmain8492]

What is the difference between the anode and cathode? How long it can operate? How can I know it is fully charged? What is the output voltage of it?

[Revanth 2310]

Cathode means +ve charge and anode means -ve charge

[mpetković1]

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 MgO.

[samuelx3]

he gets it right... but only for the first one. good catch!

[Landroo]

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.

[billbillt]

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...

[Landroo]

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?

[samuelx3]

well what's a 10-year old doing with KOH?

[abbas_hashemian]

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.

[billbillt]

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...

[Gursimran Singh 425]

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.

[Gursimran Singh 425]

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 ! ;)

[Gursimran Singh 425]

I must update.

[Pratyaksh1234]

In my dry cell magnesium dioxide present in the form of black powder which do not stick to the carbon rod. Please give me some suggestion on how to stick this powder on carbon rods
And it is important to coat carbon rod with charcol
Please reply 🙏🙏

[samuelx3]

just put some maganese dioxide in the alum solution. note: it's MAGANESE (mah- guh- knee-s), not magnesium(mah-guh-nee-see-um).

[Arbormakes]

I like the idea!
Instead of recharging it, can we just replenish the water?

[Twigguard]

If I were to make lets say 30, and connect them together, would it take longer to charge, like 3 days? Also is it ac or dc

[Arbormakes]

it is dc, and it will take longer.

[Twigguard]

What do you mean by saturated