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How old is your CPS2 battery?

Just received a MvC all in one, still on battery! This bad boy has seem a lot of arcade time. Looks like the battery might be off gassing and messing some traces up. I need to figure out if the OpenKey works on all in ones. Thanks to @Phil Bennett for this awesome game!


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The OP pointed out this wacky thread, despite my specimen not being a CPS-2 battery. I just replaced my System16 Golden Axe Hitachi FD1094 68k suicide battery and this antique was still chugging along fine with a batch date of "89-05". I wonder what that estimated life span would have been for these. I've never seen anything like it! :D
 

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XtraSmiley said:
Oh man, you got that board for a steal! Don't forget to neutralize the acid on the PCB and then clean it up!
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I did lol, she had it for $120 and I made an offer for $75 and she took it with 1hr to go.
Version 961004 so it’s less nerfed.

I knew the audio was probably her A board so I took the shot. Works great and I got the game I have been wanting 30 years now.
 
I pulled this one from a Japanese Cyberbots just today. Game came out in 1995 but battery had a 93-04 date. Anyway, I just wanted to mention that replaced 12 cps2 batteries today, all them had Tadiran 5902 installed in 2014 and 2015. Two of them already suicided, 1.2 and 0.6 v for each battery. I store all my boards in a dry temperature controlled environment.
I’m thinking about going the Infinikey/Openkey route and stop wasting my time every 10 years. I always thought these Tadiran batteries would not be as good as the original Maxell ones and this is the proof.
 

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GoldenGlover said:
Were your 5902’s in keystone holders, or were they axial?

Not all Tadirans are created equal…some have better capacity than others.
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No keystone, axial. This one has a bit more capacity (1.2 Ah) than the original Maxell battery.
Anyway, it could not have been a capacity issue as the rest of batteries removed measured over 3.6 v.
 
H! 🙂

One day, I installed a Suicide Free Modchip CPS2 for a retro game collector.

After installing a Suicide Free Modchip CPS2, he asked me if I could also put the original battery back in as an addition, as the CPS2 game
looked much more legit 😑👈

Go ahead, man, wear leggings with your 2-ruble Legit.🤭

I can't stand the word "Legit" anymore; it gets on my nerves.😡

Here are my old batteries that I kept as a souvenir, there are models with double capacity that I bought new at the time to change them every 10 years Maxell ER6C, some are still good because I put infinity keys 2/3 years ready for their installation

I just measured them; the small ones are 3.686 volts,the two large ones are 3.780 volts.🙂

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