Here's an N64 memory pak that uses FRAM, so you don't need a battery anymore (original part uses battery backed SRAM): https://github.com/Element18592/N64-FRAM

Here's an N64 memory pak that uses FRAM, so you don't need a battery anymore (original part uses battery backed SRAM): https://github.com/Element18592/N64-FRAM-Memory-Pak https://github.com/Element18592/N64-FRAM-Memory-Pak