Any idea what this PS1 memory card with a battery could be? Board is cut to fit inside memory card shell, so looks custom. Got it with a modchipped PS1, not sure
Buy Playstation 2 Memory Card Online in UAE | Sharaf DG
Sony Playstation 1 Playstation | Playstation 1 Electronic Games - Ps1 Memory Card 1 - Aliexpress
History and evolution of memory cards - Koofr blog