The Peninsula Battery 31S is a 12V Group 31 automotive battery built to deliver reliable starting power for a wide range of domestic and import vehicles. Whether you need a dependable OEM replacement or a performance upgrade, the Peninsula Battery 31S provides the cold cranking amps and service life your vehicle demands.
Specifications
| Group Size | 31 |
|---|---|
| Voltage | 12V |
| Technology | Flooded Lead Acid |
| Cold Cranking Amps (CCA) | 800 |
| Design | OEM-quality construction, corrosion-resistant terminals |
| Warranty | 6 months |
Will it fit?
Designed for a wide range of domestic and import vehicles.
Not sure? Use the Battery Finder with your year, make and model, match the group number on your current battery, or call (650) 583-6735.
What you get at Peninsula Battery
- Free battery testing — make sure it’s really the battery before you buy
- Ready in about 1 hour for pickup at our South San Francisco shop
- Same-day local delivery — $35 within 25 miles when you order by 1 pm (Mon–Fri); after 1 pm, next business day
- Installation available at our shop
- Old battery recycling and core exchange (a refundable core deposit may apply)
Why Peninsula Battery?
Locally owned and serving the Bay Area since 1993. Trusted by Bay Area fleets, airlines, healthcare systems and government agencies. DBE and ACDBE certified. Visit us at 1139 Airport Blvd, South San Francisco, or call (650) 583-6735 (Mon–Fri, 8:00 am–4:30 pm).