ALKALINE BATTERY CHARGER

Discussion in 'The Projects Forum' started by lildiesel6075, Mar 17, 2006.

  1. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
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    This is a project that afroman invented. i can be able to charge a 9 volts depleted battery or a AA depleted battery. This is a simple current source that you will find in any textbook. The two diodes are forced on, resulting in a constant 1.3V at the transistor's base. This gives a constant 0.65V at the emitter. R2 sets the charge current, which will be (0.65/R2). In this case, 0.65/10 gives 65mA out of the emitter. So regardless of what battery you attach to the collector, ~65mA will be pulled through it to charge it. 65mA is a pretty small charging current, and was chosen for safety. R1 can be anything over 500 ohms and is just there to stop the diodes from exploding.



    Parts list:

    2 1N4001 diodes
    NPN-2N3904 transitor
    battery click
    22 guage wire
    resistors ( 1K, and 10)

    there are some picture below srry about the paint.
    I completely drained a 9v battery, then used the circuit to recharge it at a measured 63mA overnight. When I woke up the battery was charged to over 10V, and wasn't even warm! It was able to function as a brand new battery just as if nothing had happened and Laura Prepon was still hot.

    I used some big power resistors and a big blue led/smurf dildo to discharge the battery as fast as I could, and used a stopwatch to time how long it took. When the led became as dim as Doom 3, a pretty redhead told me that it was time to stop the watch. I measured the 'dead' voltage to be 7.5V. I did two discharge runs, with current drains ranging from 530mA to 150mA. That's a lot btw- 5 to 10 times more than a remote control or an mp3 player would drain. The average capacity of the battery worked out to be 148mAh. Proper 9v NiMH rechargeable batteries are typically rated at 160mAh. When you take into account my high discharge current and their BS marketing, I think its safe to say the capacity of a recharged alkaline 9v is on par with a real rechargeable battery.

    <img src='http://x11.putfile.com/3/7522215789-thumb.jpg' alt='Click to enlarge'>


    Trying it on AA batteries:

    I used the same 63mA current source to charge a pair of dead alkaline AA batteries in series. Since AAs have higher capacity than a 9v, it took all day to fully recharge them.
    I discharged them at a current of 330mA for hours, and they still hadn't gone flat. I said screw calculating capacity and decided to call it a fully charged success.
    Destructive testing: After two full days of charging the AAs eventually popped open making a fizz noise, and leaked 3 drops of weak acid that was easily cleaned up with my bare hands. The experience was about as life threatening as a squirrel urinating on my lawn. The final measured voltage that killed it was 2.0V, which doesn't surprise me. Charging a 1.5V battery past 1.8V is kinda dumb.

    Summary
    You can fully recharge a depleted 9v alkaline battery at 63mA overnight without problems. You can fully recharge a depleted alkaline AA battery all day without problems. I recharged both types of batteries twice, and I would expect them to easily take many more charges. If you care about safety more than I do, attach a multimeter to the batteries and monitor them so they never reach more than 110% of their rated voltage.
     
  2. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
    21
    0

    Srry i could post the pics for some reason, it wouldn't let me put on here. But if you want some pics, wanna know how to make it contact me on Aim

    AIM: lildeezul
     
  3. n9352527

    AAC Fanatic!

    Oct 14, 2005
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  4. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
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    Oh yeah i forgot to mention that Afro man invented this.
     
  5. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
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    hi,

    i have done that same circuit way way back having that same principle in mind becoz i have been asking myself why does the batt manufacturer not recommend the recharging of alkaline batts. was it just a marketing hype to tell you to buy more batts? or was there a real technical reason?

    my question is how many times can you recharge your alka batt? is it comparable to a real rechargeable batt? :eek: ;)

    moz
     
  6. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    I think the main reason is that the battery would eventually leak and there might even a danger of explosion due to the gas being released during charging. As you know, any company would never sanctioned anything that is remotely dangerous because they are afraid of being sued.
     
  7. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
    21
    0
    No it wont explode, battery acid over time is not dangerous, its life threating as a squirel pissing on your lawn. lol.

    The reason they tell you not to charge them is beacuse, the chargers that you buy regulary, charge NIMH and NICD batteries, and they charge at likek 148mAh, if you charge an alkaline battery at 148mAh it will leak, but the charger that afroman and I built charges batteries at 63mA
     
  8. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    Umm... I beg to differ. Maybe you could google some info on battery chemistry and what kind of chemicals present inside an alkaline battery and their dangers to us. You could also google some info on chemistry reaction that happens when you try charging an alkaline battery and see what kind of gas it produces and why it would be dangerous to do that to a sealed alkaline battery. What you should do is to make a properly informed decision, based on facts and not based on a few lucky experiments.

    The manufacturers have been telling us not to charge the batteries way before NiCd or NiMH batteries and their chargers were widely available. So I don't think what you've mentioned above is the reason.

    But hey... if you want to charge them on your own risk, then my friend, by all means go ahead...
     
  9. Papabravo

    Expert

    Feb 24, 2006
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    I agree with n, if you want to be obstinate and engage in voodoo science then there is not much we can do to disuade you, but don't ever say that you were not warned. At least get yourself a pair of rubber gloves, a pair of safety glasses, and a lab coat.
     
  10. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
    21
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    Are you mentally retarded? why do you think theres so think of a battery charger that afroman and I invented. DUh so you can charge alkaline battiers, without any danger.

    God your retarded.

    The charger that we invented charges alkalines batteries with 63mA, ( which is not a lot of current for safety reason). The chargers for NiMh and NiCD charge at 163-180mA, that will make a battery leak.

    but the whole point of this charger is so you can be able to charge and recharge alkaline batteries without any danger haunting you.

    GEZZZZZZ, Your slow. Y do u think we made a charger, We wouldnt of invented it if it was dangerous> DUH!
     
  11. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
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    You might care to read this link by a battery specialist.

    http://www.batteryuniversity.com/partone-7.htm

    In particular, you might care to read this quote from it before you blow yourself up!

    "The idea of recharging alkaline batteries is not new. Although not endorsed by manufacturers, ordinary alkaline batteries have been recharged in households for many years. Recharging these batteries is only effective, however, if the cells have been discharged to less than 50% of their total capacity. The number of recharges depends solely on the depth of discharge and is limited to a few cycles at best. With each recharge, the amount of capacity the cell can hold is reduced. There is a cautionary advisory. Charging ordinary alkaline batteries may generate hydrogen gas, which can lead to explosion. It is not prudent to charge ordinary alkaline unsupervised".
     
  12. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    I'm sorry for my stupidity. I guess you and your infinite wisdom/knowledge know better. Since it was you and afroman that invented this charger and not some retarded engineer, I guess it made charging alkaline batteries safe and okay... yes... I see your logic now. Thank you for showing me the light...

    One thing that I still don't get, you kept saying you and afroman invented this circuit. However, in your first post you claimed that you invented it, and only after I posted the link to afroman page that you replied it was afroman that invented it and you just forgot to mention that it was him. Then, you edited your first post and changed the first sentence from "This is a project that i invented" to "This is a project that afroman invented". What was that all about? Forgot? "Conveniently" forgot? For a genius, you really have a bad memory my friend. Or was it caught red-handed stealing someone idea and plagiarising his webpage verbatim? Now, that was what I call work of a real genius....
     
  13. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
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    Afroman invented it, but i liek tested it and verfied that it worked, but he did all the knowledge, i tested it for him
     
  14. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
    21
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    dude, ur not stupid, u just didnt believe me thats it, but its all good.
     
  15. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    Oh no... you are right the first time. I am infinitely stupid and retarded, believe me. That is why it is so hard for me to believe you (oh btw... I still don't :p). Stupid people, like me, are slow to learn and therefore difficult to accept new radical scientific facts that a genius like you presented.
     
  16. lildiesel6075

    Thread Starter Member

    Mar 7, 2006
    21
    0
    Hey, if you dont believe that, that battery charger works, then send me a message on aim, and well do a webchat and ill hookup my battery and my charger, and well prove you worng.

    AIM: lildeezul

    (BTW, if u didnt believe the charger works y r u still posting messasges, about it, and asking question about it)



    Edited by beenthere
     
  17. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,278
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    lildiesel,

    Of the thousands of batteries you charged, discharged, and recharged, what does your statistics show as the decreasing life cycle?

    Do you think it's some grand conspiracy with the alkaline battery manufacturers to induce consumers to purchase more batteries?

    How many recharges makes it cost efficient for purchasing or building one of these chargers?

    What was your testing protocals?

    Are you marketing this product or is it for individual use?
     
  18. Papabravo

    Expert

    Feb 24, 2006
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    Why should we excuse your language. It is childish and offensive
     
  19. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    I already said I am wrong, and you are, of course, always right :p

    I am still posting because I'm having fun with this. We, stupid and retarded people, like and are allowed to have fun too.

    Oh... Papabravo, that is how geniuses talk I guess... too much education :p
     
  20. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    Hey lildiesel. We don't get much foul language on this site so I looked up your Member's Profile to see who was the author of this bile. It confirmed what I had thought - that you are a 13year old child.

    I thought I'd visit your website to find out more. I ran the video there 'I want your money'.

    Is that obnoxious little brat at the counter really you?
     
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