100% Official 4Kbit (4 Kilobits <512 bytes> EEPROM) Save Chip. Fully tested and ready for your Game Pak repair or repo build.
Upon request chip can be pre-loaded with save of your choice. Note chip has two known p/n which seen in image above - BU9850 & BK4D-NUS.
Upon request chip can be pre-loaded with save of your choice. Note chip has two known p/n which seen in image above - BU9850 & BK4D-NUS.