M3 adapter?

i have had my m3 adapter for a while and it started acting up. it wouldn't save my game data. so i desoldered the battery and now i lost it. so idk what battery to put in it and in what way it goes. i have got other flash carts like the ez-flash 4 but i love my m3 adapter cause it can play my KH: chains of memories rom.

thanks.

 

It might be a CR1220.

 

I used a CR2032 and electrical type years before I discovered this site. Since it was a duracell, it still works.

 

any good sites to buy good batteries? im gonna need them with taps.

 

Do you have the cf model? I replaced the battery on my cf model and will post pics of the pcb tonight if needed.

 

i got the mini sd version but i think they should have the same mobo. so i swap'd out the battery and it kinda works. it keeps the save for about a day or two. also i can't do a quick load. i got hit the start button to lunch the game. idk if they had a system update for back then.

this is the back of the board


this is the front and i need to know if i soldered the battery the correct way. and if i didn't would it fry something.


and this a close up of a chip that got loose when i pulled off electrical tape i had covering the board while i soldered in the battery. i was able to heat up the pads and re solder it back in. i just dont know what this chip is for.

 

Hopefully someone here a has a pic of the board. Next time take a sharpie and mark the polarity beside each terminal. (sharpie comes off with alcohol)

 

Dang, I am so envy of those M3 owners now! wish one of these were mine. =(

 

My M3 Battery (Panasonic CR2016) is reversed compared to yours, but the polarity still matches, so you are good to go. BT1 is Negative.


I think that chip is for RTC.

My Pokemon Emerald RTC worked to the point of being able to grow berries and take lotteries daily.