BMW E30 3-Series Service Indicator Battery Replacement(1983-1991) | Pelican Parts DIY Maintenance Article
E30 SI-board Battery - Large model | Odometer Repairkits | tims-classic-parts
Alternative SI battery solution? - R3VLimited Forums
Qty2) New BMW Sanyo/FDK E30 SI Board Batteries E23 E24 E28 E30 3Volt | eBay
SI Board Batteries - Info Please | BimmerFest BMW Forum
Bimmerforums - The Ultimate BMW Forum
BMW E30 SI Board info and troubleshooting - Bavarian Restoration
Myth about E30 instrument cluster service interval board aka SI board batteries - YouTube
just pulled the SI board | BMW Werkz
SI BOARD BAT+CAP – E30 Clusters
My temp gauge and tach were not working so I replaced SI batteries but realised that there is a small repair done on pcb trace and some of the transistors are blown.
BMW E30 SI Board info and troubleshooting - Bavarian Restoration
Bimmerforums - The Ultimate BMW Forum
BMW E30 - Replacing the SI Board Lithium Batteries - - YouTube
TCEuro - TCESIBATT - SI Board Batteries Sanyo/FDK Pair