Amazon.com: Rome Tech Replacement CMOS Battery for Sony Playstation 2/3 - PS2 PS3 Backup RTC BIOS Battery - 2 Wire Cable (1-Pack) : Video Games
12V 2.3Ah Replacement Battery For Power Kingdom PS2.3-12 - (2 Pack)
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Replacement Cmos Battery For Sony Playstation 2/3 - Ps2 Ps3 Backup Rtc Bios Battery -2 Pins 2 Wires - Laptop Repair Components - AliExpress
Intec Xbox ps2 gamecube Rechargeable Black Battery Pack wireless NOS g52089 301152940405 | eBay