I had a marvel superheroes suicide battery go out. I had a tech take a look at it and he told me what had happened. I thought that he was making it up. I couldn't believe that any company would puposely make a product that would breakdown. I understand parts wearing out, but this is totally different. What a crappy company. It cost me 100 bucks to get it fixed.
Capcom did this in a bid to stop piracy. It worked for a while, as people who tried to dump the CPS2 roms ended up killing their boards, and the cost wasn't enough to justify the continued attempts....
...until Razoola cracked the XOR encryption scheme and released the tables publically. Now it's possible not only to emulate the games, but to "Pheonix" a broken CPS2 board by applying the XOR table to the ROMs, and re-burning them to the actual unit. Currently there's only one or two people who do this. Razoola over at CPS2Shock is one.
In an attempt to stop the wrong-doers, Capcom has hurt paying customers. This is nothing new. Anti-piracy measures *ALWAYS* hurt paying customers. Look at the stupid DRM-infected crap we're getting on DVDs and CDs these days, and the rootkit debacle by Sony some months back. I certainly understand why companies WANT to do this sort of thing, but I adamantly disagree with their methodology. Anyways... enough of my soapbox crap...
As mentioned you can get CPS2 boards pheonixed if they die. Better yet, you can follow the guides on CPS2 shock to replace your CPS2 batteries BEFORE they die. If you buy a second-hand CPS2 board, I strongly recommend you find a quality repairer and get them to do this sooner rather than later. It will extend the life of your CPS2 board by a few years.
CPS3 is another story. It's doable, but extremely volatile. Capcom realised their CPS2 encryption was weak, and have since upped the ante with CPS3. There are faint rumours circulating around the net that Razoola has broken CPS3 encryption but is holding off release of the data for a while to ensure CPS3 dies a natural death in arcades first. I'm bery hesitant to believe this, but don't discount it's a possibility.
Either way, CPS3 is a bad investment for the home user. As an arcade operator you don't have much choice. As a home owner wanting to play Street Fighter III, you're better off tracking down a home console version if you want to be playing it for a number of years without any worries. Remember that CPS3 was designed to be used in an arcade where it is turned on nearly 24/7. As home users who might only run their games for a few hours a day max, you are going to deplete your lithium batteries much faster than an arcade operator.