Changing batteries

[Zebbe]

After obtaining a 4.5 mm gamebit with a few CR2032-batteries, I opened up my pal's Dungeons and Dragons - Warriors of the Eternal Sun and removed the battery, then soldered on a new one onto the little metal piece which held the old battery. I tested the game and saved it, loaded the save, turned it off, turned it on and tried again a few times - and it worked! The save is still there a few hours later. I think my pal is gonna be pretty happy about this since he had his Mega Drive on for two weeks with this game, until his mother turned it off :eek:. Maybe she didn't know the game had an empty battery... Anyway, I'd like to ask all of you if you have done the same thing, but maybe in an easier way than soldering. I was thinking maybe some good ol' sellotape works as good to put the battery in place. How do you do it? And can someone tell me where the battery is in the Sonic 3-cart? I didn't see any CR2032 when I opened up mine, which bugged me since I've wanted to replace the battery for a very long time. Maybe I just have to buy a new cart in this case.

[Genesis32x]

Does sonic games have save batteries? i wouldnt imagine so, but they should.

[Zebbe]

Sonic 3 has a save function at least, but I didn't find any CR2032-battery inside the cart.

[Genesis32x]

i wished the sonic series have save functions, i have very short attention span so i cannot sit for an hour and play and play and play, 20minute is my max gamy playing time, but i guess we all learn to live it it;)

[ary incorparated]

Zebbe,it think theres a Eprom build inside,Erasable Programable Read Only Memory.it could be built in the main IC.

[Zebbe]

What should I do then? Buy a new Sonic 3 and hope that the battery in that cart works, since the battery in my Sonic 3 keep erasing my files all the time? It makes me pissed.

[ary incorparated]

Thas a option,since reparing ic or eproms is a chore or just a damn difficult job.Sonic 3 isnt that expensive these days,for 5 or 10 euros youlle have it.

[Zebbe]

Thanks for the info, ary! I think I'll buy a loose Sonic 3 cart and put it in my old Sonic 3 box :).