SCROLL DOWN FOR VIDEO The Porsche Lead Acid Batteries For MFI 911S Are Heavy - And Often Leak Acid Into The Front Of The Car - Not What You Want - Especially If You Just Restored It! * Installation Video Below The MFI 911S - Using These Stock Batteries - Can Experience Slow Startup - Surge/Hesitation At Cruising Speed - And Unbalanced Fuel Mixture.Why Odyssey? For Years We've Installed Odyssey Batteries On All Of Our Projects At Patrick Motorsports. The Advantages Are Crystal Clear: **No More Leaks: Odyssey Batteries Are AGM (Absorbent Glass Mat) Dry Cell Type. They Have No Liquid Acid Inside - If You Cracked One Open Nothing Would Leak Out! **Lightweight: Due To Having No Battery Acid Inside - They Are Considerably Lighter Than The Porsche Batteries. **Faster - Reliable Startup: Cold Starts Are A Breeze With Odyssey Batteries - As They Operate At A Higher Power Level. **Increased Ignition Output: This Is The #1 Reason To Upgrade. The MFI Porsches Take Full Advantage Of The Higher Ignition Output - Resulting In Better Combustion - Smoother Performance - And Lower Emissions. 1969 1970 1971 1972 1973 Dual Battery 911 Models. This Kit includes: ODSAGML / PC925A Batteries (QTY 2) + Battery Mounts (QTY 2) + SAE Terminal Adapter Kits (QTY 2) - 01/22/2026 Note: The Odyssey Battery Dimensions Are: 6.60 in L x 6.90 in W x 4.70 in H (Length x Width x Height With Terminals) Alternate Part Numbers: ELE BAT 911 DBK PMS / PMP 911DBK / PMP-911DBK / PMP.911DBK / PMP911DBK 01/22/2026