(Topic ID: 114970)

WPC-89 Lithium Battery Conversion


By DocRotCod

5 years ago



Topic Stats

  • 18 posts
  • 11 Pinsiders participating
  • Latest reply 4 years ago by tdddddd
  • Topic is favorited by 3 Pinsiders

You

Linked Games

No games have been linked to this topic.

    Topic Gallery

    There have been 9 images uploaded to this topic. (View topic image gallery).

    365068.jpg
    IMG_5856.jpg
    IMG_4592.jpg
    IMG_1379.jpg
    IMG_0991_000.jpg
    IMG_1725.jpg
    IMG_2105.jpg
    STROMVERBRAUCH ASIC.GIF
    photo (32).JPG

    #1 5 years ago

    Saw somewhere online where they installed a coin battery holder and a 3-volt CR2032 lithium battery. I tried it and it works great. My question is, the original holder was 3 AA battery = 4.5V, the Lithium is 3V. Is the only downside shorter battery life, if at all?

    #2 5 years ago

    I don't think you'll have any battery life problems.

    Can you show me how you mounted your 2032? I've been looking for a clean way, haven't put a LOT of thought into it yet, but didn't think of a clean way right off the bat.

    #3 5 years ago

    Note the cr2032 does work well on WPC, but i suspect it won't last as long as AAs. I have had a Demo man with this mod running for about 2 years now. He's my test game (a lot more games get this mod, but none have been living with it as long as that Demo man.) I use the modification shown below. Just requires one added wire (black wire seen below the coin battery holder.)

    photo (32).JPG

    #4 5 years ago
    Quoted from cfh:

    Note the cr2032 does work well on WPC, but i suspect it won't last as long as AAs.

    Alkaline AAs are about 2000 mAh capacity, and CR2032 are about 200 mAh, so you're right, they won't last as long. How often do you actually exhaust a set of AAs, though? If you're getting over 2 years in the DM, that's longer than I'd leave AAs in a game. I did a similar mod to my LOTR; Hwawonyu has it now.

    Now that I have a Hakko 808, however, I'd normally go with NVRAM instead.

    #5 5 years ago

    Why not just use aa lithium or nvram?

    #6 5 years ago

    Interesting, my 2032 holders don't clear the reset generator.

    At least, I don't *think* they would. I'll try one again later.

    The CR2032 + holder costs maybe a couple of bucks for the pair. Granted, that's buying in bulk.. but if you're going to fix a lot of games, it costs less in the long run.

    #7 5 years ago
    Quoted from DocRotCod:

    Saw somewhere online where they installed a coin battery holder and a 3-volt CR2032 lithium battery. I tried it and it works great. My question is, the original holder was 3 AA battery = 4.5V, the Lithium is 3V. Is the only downside shorter battery life, if at all?

    Since you are running at a lower voltage, the ram actually is consuming less current.

    In my test games i have crappy brand CR2032 (brand name with terrible reviews for not lasting long) going for over 1.5 years now still at 3vdc.

    #8 5 years ago
    Quoted from johnwartjr:

    Interesting, my 2032 holders don't clear the reset generator.
    At least, I don't *think* they would. I'll try one again later.
    The CR2032 + holder costs maybe a couple of bucks for the pair. Granted, that's buying in bulk.. but if you're going to fix a lot of games, it costs less in the long run.

    This is so true. I fix boards for $$$ and a cr2032 in a holder is by far the most economical way.... and it is not just a cheap solution. it works fine specially in games with 5101 rams like sys 3-7 wms, bally/stern, etc...

    I have a few different cr2032 holders in different shapes. I bought some ones to fit NES and SNES cartridge games and it turns out they fit certain MPUs better.

    #9 5 years ago

    Nice mod.

    Its another part to add to my Mouser order or scrounge around Rat Shack to see of they have any.

    #10 5 years ago

    As for the transistor device near the cr2032 holder. That's an easy fix. Gently heat the middle and bottom legs together (component side), and push the device gently to the north. Problem solved.

    As for cost cr2032 holder and battery is cheaper (less than a dollar) then a remote holder and three AA batteries ($1.50).

    #11 5 years ago

    Problem will be the ASIC, means, RTC will not work below 2,8V!!!! The RAM even works below 1V!!!

    Here is a list I made a few years ago built on the measurements, a friend of me made.

    Mit RAM = With RAM
    Ohne RAM = Witjout RAM

    STROMVERBRAUCH ASIC.GIF
    #12 5 years ago

    So at 3v coin cr2032 gets 230mA..... The life would be around...

    230,000 / 27 = 8518 hours or about a year.

    wonder what the voltage drop over time curve looks like.. that would effect life i assume too as the current draw decreases as the voltage drops.

    #13 5 years ago

    So far two years on the demo man.

    #14 5 years ago

    Thanks for all the input. It does seem to be working fine on my end. This is for my swap/test board anyways so I'm not overly concerned about numerous years of holding information.

    #15 5 years ago
    Quoted from barakandl:

    wonder what the voltage drop over time curve looks like

    Lithium discharge curve is pretty flat until just before it dies, then it falls off steeply.

    4 months later
    #16 4 years ago

    I have put lithium batteries in all of my factory test fixtures back on December of 2011, and they are still going strong.
    My thought on using lithium batteries instead of 3 AAA batteries, is if I can get a year out of them, I was going to be happy, and started putting them in all my games since December 2012 and they still have 3 volts.
    I have seen so much acid damage done by 3 AAA batteries leaking, I seen 3 AAA batteries less than 2 years old with 1 AAA dead and leaking and destroying the CPU, and game still booting up because it still had 3 volts to boot the game up. I have seen the vapor from leaking batteries in a remote battery pack do damage to boards also. Gottlieb has used 3 volt lithium battery in all of their System 3 games , and they don’t go bad until almost 20 years later, and none of them had leaked to do any damage.
    To make it look clean when putting mounting a Lithium battery, run the ground wire jumper on the back side of board.

    IMG_2105.jpg
    IMG_1725.jpg
    IMG_0991_000.jpg
    IMG_1379.jpg

    IMG_4592.jpg IMG_5856.jpg
    #17 4 years ago

    If anyone needs a new battery board for the WPC-S, I have one left. (It was tentatively sold, but buyer backed out..) $25. Supports AA's and CR2032. (Not a 2325.)

    365068.jpg
    #18 4 years ago
    Quoted from Coyote:

    If anyone needs a new battery board for the WPC-S, I have one left. (It was tentatively sold, but buyer backed out..) $25. Supports AA's and CR2032. (Not a 2325.)

    365068.jpg (Click image to enlarge)

    PM sent

    Promoted items from the Pinside Marketplace
    From: $ 9.99
    Eproms
    Matt's Basement Arcade
    $ 24.95
    Playfield - Toys/Add-ons
    ULEKstore
    $ 190.00
    Tools
    PinDoc Restorations
    € 22.00
    Cabinet - Other
    YOYOKOPTER MODS
    $ 10.50
    Playfield - Decals
    The MOD Couple
    $ 20.00
    Various Novelties
    GC Pinball
    $ 35.00
    Playfield - Toys/Add-ons
    3D MODS
    $ 5,899.00
    Pinball Machine
    Operation Pinball
    $ 69.99
    Playfield - Toys/Add-ons
    Lighted Pinball Mods
    $ 18.95
    $ 209.99
    $ 29.99
    Eproms
    Matt's Basement Arcade
    $ 74.00
    Cabinet - Armor And Blades
    Id Rather Play Pinball
    $ 5.00
    Playfield - Decals
    Metal-Mods
    $ 7,899.00
    Pinball Machine
    Classic Game Rooms
    $ 9,099.00
    Pinball Machine
    Little Shop Of Games
    $ 79.00
    From: $ 42.00
    Cabinet - Shooter Rods
    ModFather Pinball Mods
    $ 79.99
    Cabinet - Armor And Blades
    PinGraffix Pinside Shop
    $ 13.50
    Playfield - Plastics
    Pinball Haus
    $ 8.00
    Cabinet Parts
    RPGCor
    $ 79.00
    From: $ 175.00
    Gameroom - Decorations
    Pinball Photos
    $ 7,500.00
    Pinball Machine
    Nitro Pinball Shop

    Hey there! Got a moment?

    Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside