Introduction: Bring Dead Ni-Cad Batteries Back to Life
Are you tired of having your Ni-Cad batteries that refused to charge and simply die?
So what do you do with them when they die?
Just throw them in the trash - which harms the environment?
Or just take them to a recycling facility for them to be recycled?
Well, here is the best solution, bring your dead batteries back to life that can save you a chunk of change - By zapping them!
Here is one great instructable, Revive Nicad Batteries by Zapping with a Welder. Of course, you will need a welder, and not many people has one... So I came up with this idea that almost anyone can build!
UPDATED: This instructable has been featured in hackaday!
This instructable involves hacking a device that operates on 300 volts and can be dangerous if not handled correctly. So, I am NOT responsible whatever happens to you using this information.
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Step 1: So, Why Do Ni-Cad Batteries Die?
They don''die''s capacitor instead for this project. Why? Because they are suitable for pulse discharging, and best of all, they are FREE! But they are more dangerous...
So, what you will need for this project are...
- A disposable flash camera
- Dead Ni-Cad batteries
- Battery holder for the dead Ni-Cads (You can use size AAA, AA, C, or D, depending what battery you want to zap. I am going to use an AA battery holder for this instructable.)
- Small switch (I used a slide switch)
- High power switch (I used a push-button switch)
And for the tools, you will need:
- Soldering iron (You might be able to get away with out doing any soldering by twisting wires in place.)
- Wire cutters
- Wire strippers
- Flat head screwdriver
Step 3: Slaughter the Camera!
Give a general description of the StepNow this is going to be a fairly dangerous part, open up the camera and get the circuit out safely without getting shocked by the capacitor...
(The capacitor in the camera is a large black cylinder thing, it is used for making flashes for the camera.)
First, pry open the camera''s case off, discharge the capacitor with a insulated screw driver, and you may get a big loud spark, and after that, the capacitor is discharged... (Use a screwdriver you hate so much, because a fully charged capacitor will leave a scar on the metal part of the screwdriver!)
Great! You had done the dangerous step on this instructable! (Some people say this is the fun part of the instructable because you get a loud spark from the capacitor.)
Step 4: Remove and Add Switch
After the camera''t be too hard to remove.
Then solder two pieces of wire on both exposed metal tabs. And solder a '' charge switch onto the other ends of the wires.
Step 5: Add the Battery Holder an the Switch
Then we need to solder the battery holder and the high power switch together with the black capacitor.
Solder the black wire of the battery holder to the lead of the capacitor that is the closest to the grey stripe.
Solder a piece of wire to the other lead of the capacitor.
Then solder the push-button switch to the red wire of the battery holder and the other wire.
Also, the battery holder you just added, that is where you put the dead Ni-Cad battery to zap them.
Step 6: Insulate the High Voltage
Okay, you are almost done! All you need to do is somehow insulate all the high voltage parts...
You could put it in a nice project box... But I don''s circuit.
And you are done!
Step 7: Zap the Hell Out of the Battery!
acid battery reconditioning 🔴how to acid battery reconditioning for To zap a dead Ni-Cad battery back to life, put the Ni-Cad battery into the '' battery holder and a good alkaline battery into the battery holder on the camera''POP''re run completely flat. they will explode violently if overcharged too much.
and if they dont overheat and explode they will have 10-fold less life. so instead of 10 years maybe you''ve used hundreds of disposable cameras for various purposes, they''re only $3 at harbor freight.
Would that work? If so, I may go bigger, just for fun and use my salt water capacitor..it''t have to. I''s set around unattended and very often when I place individual batteries into a charging unit it will reject them due to the fact that they are super dead.
acid battery reconditioning ☑how to acid battery reconditioning for Here is the hint! I have a glass top electric stove in my kitchen.
1. Turn a burner on high heat for about a minute.
2. Reduce heat to medium.
3. Roll the battery back and forth across the burner, Do Not let the battery set in one position over the burner, keep rolling the battery back and forth over the burner until it is very warm to the touch,
Not Burn Your Self Hot! Just very warm. This will excite the electrons in the battery enough that the charger will recognize positive from negative and most of the time they will charge and operate for 1 last update 2020/07/15 normally.Not Burn Your Self Hot! Just very warm. This will excite the electrons in the battery enough that the charger will recognize positive from negative and most of the time they will charge and operate normally.
4. The best practice is to Always keep them charged however if your like me, we forget.
5. WARNING DON''s manufacturer says so you can charge both with any type of charger. Typically though each one is for its own kind of batteries. However, I have rebuild a few old NiCd power packs using NiMh batteries, charged for 1 last update 2020/07/15 them with a smart NiCd charger made by B&D and so far did NOT have any adverse effects whatsoever. Performance wise the NiMh outperform NiCd in the capacity category and last considerably longer. NiCd on the other hand seem to be able to provide a bit more initial torque than NiMh but I have not been able to reliably substantiate this claim. All in all, I believe from personal experience that NiMh are a much better replacement for NiCd overall.5. WARNING DON''s manufacturer says so you can charge both with any type of charger. Typically though each one is for its own kind of batteries. However, I have rebuild a few old NiCd power packs using NiMh batteries, charged them with a smart NiCd charger made by B&D and so far did NOT have any adverse effects whatsoever. Performance wise the NiMh outperform NiCd in the capacity category and last considerably longer. NiCd on the other hand seem to be able to provide a bit more initial torque than NiMh but I have not been able to reliably substantiate this claim. All in all, I believe from personal experience that NiMh are a much better replacement for NiCd overall.
Reply 4 years ago
True sir, most smart chargers can charge either type. Also, I have observed from my own experience that NiMh batteries start with a higher fully charged output voltage (I know that NiCd batteries only charge up to 1.25 volts per cell) and last far longer than their NiCd equivalents.
NO you can NOT
Totally different system
Reply 4 years ago
They are a different system but they are not "" different. If one has a "" charger, especially if for 1 last update 2020/07/15 it was manufactured after 2005, charging either type of batteries with a NiCd charger should be no problem. In general however, I wouldn't recommend charging NiCd batteries with a NiMh charger.They are a different system but they are not "" different. If one has a "" charger, especially if it was manufactured after 2005, charging either type of batteries with a NiCd charger should be no problem. In general however, I wouldn't recommend charging NiCd batteries with a NiMh charger.
could this be used to give laptop batts a second life?
those suckers are pricey.
i woudnt risk it!
li-ion or li-po batteries are very dangerous! but you can rebuild them!
just open it up then order the same type of "" that look like batteies, then just replace!
it is somewhere on the net....
Reply 4 years ago
acid battery reconditioning 🔥how to acid battery reconditioning for Thank you for answering this question!
what if the laptop battries are AA sized and you know they are Ni-Cad
late reply, but you could try freezing the batteries for 12-14 hours then cool down recharge then discharge several times. it worked for me with one battery, but not with the second, look around the internet for more information