many console games would save by a battery within. there are many games that save without a battery. how?

Question

i'm not talking about games that save with a memory card

the best example i could give is tactics ogre for the gameboy advance. the first batch release of this game had a battery inside to facilitate saving. apparently, there was a second batch that contains no battery that i could see, but still saves. how? both chips looked exactly the same, with the exception of the round battery.

Answer 1

With newer 'cartridge' style games, it uses Flash RAM, the same technology used in little portable 'keychain' USB drives and stuff. That does not require a battery to keep the memory, so it is a more reliable system.