My buzz controllers still have the original batteries and somehow they still work : r/PS3
Buzz! Standalone Wireless Buzzers (PS3) : Amazon.co.uk: PC & Video Games
Trade In BUZZ Controllers for PlayStation 3 (4 Required) | GameStop
Saving a Buzz controller from e-trash - YouTube
What we can do with the old PS2/PS3 Buzz devices – www.MrAddon.com ®: Jira & Confluence Administration Support Blog & Ethereum Dev Blog – [www.MrAddon.blog] ®
Do ps2 buzz controllers work on the ps3 slim model? : r/PS3