whut? I've already modded my boards with coin cells and that's fine for me atm... so ummm... either some tech guru enlightens us or you experiment and report the outcomeJust cant wait to hear from you...
Great thread, full of very informative info. I've been having a lot of issues lately with my MV-4FT2 not handling all four slots, I think it is the power supply dying out as I've checked the voltage and it's unstable. I've had the board for ten years and I could not remember who or where I bought it from on eBay.
So decided to check the battery, and it appears that this board had already been modded with a rechargeable Lithium battery, but as you can see, there is another modification which appears to be some resistor in a sheath running from the location of the battery to a chip. This may be completely unrelated to the battery as it appears to be some sort of grounding. I may be wrong.
But this also looks like it was factory installed. The backing on the underside of the board is completely intact and does not appear to have been tampered with. Again, I may be wrong but the battery is a Toshiba VG2430 which is the same battery MtothaJ said he believes came factory installed on his MV-1FZ board.
Thoughts anyone? And do I ever need to consider changing out the battery? The 470 charger resistor is still intact.
View attachment 8664
It's not a resistor.
It's a Diode.
I have never seen this battery setup before.
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Imho, go with the Coin Cell mod.
Coin Cell mod is the way to go.
Where can I buy the correct battery in which to do the battery replacement mod? Should I go with a Coin Cell battery? It is a NEO-MVH 4 slot.
If you are planning to do the regular battery replacement mod from Jamma Nation, then you can buy the coin cell in any electronic/photography shop. It should be very easy to find it if you are looking for a CR2032 model.
Don't forget to cut off/remove the 470ohm resistor if you're going with the coin cell mod and do not put in a fitting rechargeable cell.Where can I buy the correct battery in which to do the battery replacement mod? Should I go with a Coin Cell battery? It is a NEO-MVH 4 slot.
Don't forget to cut off/remove the 470ohm resistor if you're going with the coin cell mod and do not put in a fitting rechargeable cell.
And as Hodor said, the CR2032 are pretty much perfect for the job.
The board will keep on charging the battery... or at least try to. So if you're not using a rechargable one with the right voltage --- BOOM!what would happen if I left the resistor on?
hello,
I know that on the sega saturn if you turn on the system and replace the battery you will not lose the game save data, does anyone know if the same applies for a MVS board that's been modded to use a cr2032?
thanks!
On MVS, the only things stored in BRAM is scores and soft dip settings and bios settings. Only the memory card save progress for games that support it.
thanks Xian, do you know if those settings would be saved if the battery is replaced while the board is on?
also would a gopro camera battery work? it's a 3.7v Li-ion 1400mAh rechargeable
thanks again.