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Thread: The bad battery thread

  1. #101
    Crossed Swords Squire
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    Question: I visited RadioSuck last night to pick up a 3.6v NiMH 80mah battery to replace the one on my 4-slot MB... of course RadioSuck didn't carry any PCB component type batteries in store... only available online. I sucked it up and bought a cordless phone battery... 3.6v NiMH 300mah I think it is.... I hacked that bad boy on to the MB and it appears to be working fine... is there any negatives to this setup other than it not being "stock"?

  2. #102

  3. #103
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    So many boards broken i have done many sega systems like this but i always change the batterys even before it leaked.

  4. #104
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    Wonderful thread. Before and after of the board from my cab. Yanked the coin cell battery off an old Pentium 3 mobo I had lying around and not a moment too soon.


  5. #105
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    Quote Originally Posted by Xian Xi View Post
    Only thing I can think of is that it is 3 x bigger in capacity than the stock so it will take longer to get it fully charged.
    But from what I understand, the benefit is a much longer down time without losing the charge.

    ~Anselm~

  6. #106
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    The battery on my PGM mobo was leaking so I removed it. I'm pretty new to all this stuff so without this thread, I'd have had a dead board in time for sure due to ignorance. Thanks for all the great info guys. Anyways, I see that when you are going to replace a neo mobo's battery you need to remove that 470 resistor. Does anyone have a pic or a link to a tutorial that shows what kind of modifications need to be made to a PGM mobo before putting in the new coin cell battery?

  7. #107


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    ok replacing the battery on my 2 1-slots now i think i read through these pages that you have to remove the resistor marked 470 (im using coin holder with non rechareable battery) which is next to the battery on my MV-1FT but on my 1FZ its a 470 capacitor next to the board.

    Just making sure before i do something i regret

    bri
    Last edited by bwi; 11-27-2010 at 10:23 AM.
    George is mine

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  9. #109


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    so on the 1FT i'm good with the 470 resistor and is there a diagram for the FZ somewhere?

    Bri
    George is mine

  10. #110
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    Quote Originally Posted by mrbippers View Post
    Wonderful thread. Before and after of the board from my cab. Yanked the coin cell battery off an old Pentium 3 mobo I had lying around and not a moment too soon.

    em..... thats a lithium battery not a ni-cad or ni-mh battery, i hope you stopped the board trying to recharge it or it wont last very long and explode!

  11. #111
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    It seems he removed the 470 Ohm resistor from the recharge circuit.
    That way you can use the non-rechargeable battery fine (which is btw the best option if you don't use daily the board).

  12. #112
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    Quote Originally Posted by massimiliano View Post
    It seems he removed the 470 Ohm resistor from the recharge circuit.
    That way you can use the non-rechargeable battery fine (which is btw the best option if you don't use daily the board).
    sorry i couldent see the 470 ohm resistor in either picture, but now i can see the space where it was!

  13. #113
    drunk downunder!
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    Remembered I already asked the same thing earlier, in relation to operation without battery. Apologies.
    Last edited by lachlan; 02-01-2011 at 04:14 AM.



    For the tunes chat crew!

  14. #114
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    hi

    looking for a battery here in the UK i found the Maplin one (BN22Y) had 2 pins on one side. now i know thats not a problem apart from it not looking so good on the board!, so i went in search of a 2 pin one, i found one at mds battery and at a resonable price with free delivery in the UK. So in case anyone else is interested here is the link to the battery

    http://www.mdsbattery.co.uk/shop/pro...uctGroupID=820

    I have no connection with the site and if i have done wrong by posting a website then let me know and i will delete the link, but i thought it good to let others know of a cheap battery source in the UK

    cheers
    Andrew

  15. #115
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    in addition to the above post, no minimum order too! so you can just order the 1 battery and not have to buy 10!

  16. #116
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    Scoured the forums/Webs for hours, can not find info on battery replacement for a MVS MV1A board.

    I want to replace with a Non-Rechargeable LithiumIon 3v Button cell, but i dont want to burn my house down. Unfortunately this motherboard doesn't seem to have ANY resistors on it.


  17. #117
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    Quote Originally Posted by mekishiko View Post
    Scoured the forums/Webs for hours, can not find info on battery replacement for a MVS MV1A board.

    I want to replace with a Non-Rechargeable LithiumIon 3v Button cell, but i dont want to burn my house down. Unfortunately this motherboard doesn't seem to have ANY resistors on it.

    I tried to find a MV1A in my collection, but no luck. Can you post a sharp picture of the bottom of the board in the battery area? Please, first discharge your own static to any good grounding in your house and remove that foam crap that SNK used to put in the battery area.
    "appleTV-like" Consolized NeoGeo MVS builder (take a look here)

  18. #118
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    Quote Originally Posted by distropia View Post
    I tried to find a MV1A in my collection, but no luck. Can you post a sharp picture of the bottom of the board in the battery area? Please, first discharge your own static to any good grounding in your house and remove that foam crap that SNK used to put in the battery area.
    How to Disable the charging circuit on MV1A and MV1B? Here are the higher Res pictures. Thanks!

    MV1A




    MV1B



  19. #119
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    Just put a schottky diode in series with the positive terminal of the battery so that current can leave the battery, but it can't enter it.

  20. #120
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    I just got my first mvs board, a mv-1f and decided to check the battery. It had early signs of leaking, those dust type things shown in the first pics. So I removed the stock battery and put in a coin battery holder for a cr 2032 3v lithium battery. I have already removed the 470 ohm resistor.

    My question is, near the solder point for the positive terminal on the stock battery, there is another solder point close to it, which appears to connect to the recharging circuit, or where the 470 ohm resistor used to be anyway.

    Should the positive point on the coin slot battery holder and this other point be connected? I thought they were when I took the stock battery out, but figured I would ask before powering the board up.

    Points in question are in red here.

    http://i217.photobucket.com/albums/c...z/HPIM0720.jpg

  21. #121

  22. #122
    Lazy SNK Employee
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    Quote Originally Posted by mrbippers View Post
    Wonderful thread. Before and after of the board from my cab. Yanked the coin cell battery off an old Pentium 3 mobo I had lying around and not a moment too soon.

    ^ my battery looks kinda like the left picture.... there are some green bits in the same spot on my 2-slot's battery. Not quite as much, but there's some there.

    Here's the thing - I have absolutely no experience soldering, and do not want my 1st attempt to be on my mvs-2.... how long do I have until this is going to be a problem? I cleaned off most of the green stuff with a bit of rubbing alcohol, but I know I didn't get it all...


  23. #123
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    I dont know what guys here have to say, but I've seen "sealed" batteries like that spilling corroding liquid in few weeks. It depends on many factors (eg. ambient temperature and battery materials).

    If you have no experience soldering, better search for someone that can do the job. The damage can be terrible, so do it asap.
    And never forget to place a diode the way Hewitson told before!
    "appleTV-like" Consolized NeoGeo MVS builder (take a look here)

  24. #124

  25. #125
    Lazy SNK Employee
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    Quote Originally Posted by Xian Xi View Post
    If you don't know how to solder it and it's getting bad you can always snip the 2 legs to at least remove the battery.
    I may do that at first.... I really need to acquire this skill though. Thinking about hitting my local Microcenter at lunch to get some starter materials/tools.

    Any advice on what I should be buying?

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