Bosch S6585B High Performance AGM Group 48 Battery
Priced as of May 28, 2026
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CarCareTruth's Analysis
Last reviewed May 28, 2026
TL;DR Group 48/H6 AGM with 760 SAE CCA, engineered for start-stop, 4-year Bosch full-replacement warranty. Community service-life evidence is insufficient (29 reviews) to confirm multi-year durability.
What it is and how it performs
The S6585B is a flat-plate AGM in BCI Group 48/H6. Bosch designates the chemistry explicitly (Battery Cell Composition: Lead-Acid, AGM) — 760 SAE CCA is the primary cranking figure; no PCA substitution; reserve capacity 120 minutes. Built for start-stop vehicles with brake-energy recuperation. The Bosch 4-year full-replacement warranty appears in the feature bullets; the Amazon specs field reflects the third-party seller's 30-day return window only. At 29 reviews, community service-life evidence is insufficient to confirm multi-year durability.
Who should buy this — and who should skip it
Right pick for a vehicle requiring Group 48/H6 AGM at 760+ CCA in start-stop use. Skip if budget matters — comparable Group 48 AGM options cost significantly less, and the 4-year warranty has limited community validation.
Safety and environmental impact
Sealed AGM — no chemical exposure pathway in normal installation; Prop 65 lead-warning is a hardware label fact. Spent lead-acid batteries flow through the retail core-charge return system; approximately 99% are recycled at certified smelters.
From the manufacturer
Marketing copy from Bosch, via Amazon. Not editorial.
- •[START-STOP READY]: Bosch S6 High Performance AGM batteries are engineered for start-stop vehicles with brake-energy recuperation, delivering constant optimal power for short trips and stop-and-go traffic
- •[LONGER LIFE & DURABILITY]: Advanced AGM design provides up to 2x longer service life and 4x higher deep-cycle resistance than conventional batteries, with excellent vibration resistance and robust internal connections
- •[BOSCH RELIABILITY]: Delivers dependable OEM-approved starting power in extreme hot and cold climates, with excellent charge acceptance and consistent performance you can rely on
- •[SAFE & MAINTENANCE-FREE]: 100% maintenance-free AGM battery features sealed, spill-proof construction, flushed tops to reduce acid leakage risk, passenger-compartment safe design, plus a 4-year free replacement warranty
- •[SPECIFICATIONS]: Group 48 (H6/L3); Amp hours (Ah): 70; Cold Cranking Amps (CCA): 760; Cranking Amps (CA): 875; Reserve Capacity (Minutes): 120; L/W/H (mm): 278 x 175 x 190; Weight (Pounds): 47.5
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Bosch
- Vehicle Service Type
- Passenger Car
- Voltage
- 12 Volts
- Battery Cell Composition
- Lead-Acid, AGM
- Item Weight
- 45.5 Pounds
- Number Of Cells
- 6
- Terminal
- SAE Terminal
- Unit Count
- 1.0 Count
- Automotive Fit Type
- Vehicle Specific Fit
- Manufacturer
- Bosch
- Compatible with Vehicle Type
- Passenger Car
- Battery Type
- Lead-Acid, AGM
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Bosch quality
More expensive but is superior quality, strong and immediate starts. installed on 2013 porsche boxter S.