Saving on non Battery cartdrige Hi people !

i've juste made my game in GB studio, and i have trouble with the save options ,   


i've bought generic MBC3 cartridge over the internet, where the game inside can be saved. but when i overwrite my ROM on it, the save is not working.   


there is no battery on this rom, so obviously the classic save is not working, but is there a way to save inside with the same technique the "unoficial" rom are saving ?  


Thanks !