Optima
Optima RedTop 8020 Group 35 Starting Battery, 720 CCA
Editor’s scorecard
Editorial scores from 0 to 10, comparable across products in this category.
Full specifications
Specifications
| Subcategory | Replacement starting battery (SpiralCell lead-acid) |
| Material | SpiralCell lead-acid, maintenance-free |
| Vehicle compatibility | BCI Group 35 — confirm your vehicle's battery group size before ordering |
| Weight | 14.4 kg |
| Dimensions | 17.2 x 23.8 x 19.5 cm |
| Voltage | 12 V |
Other details
| Cell design | SpiralCell (wound plate) lead-acid |
| Cold cranking amps | 720 CCA |
| Terminal | SAE post |
| Mounting | Versatile — multiple mounting orientations supported |
Where does this part go?
Engine bay — battery tray
Highlighted in orange on the diagram — this is roughly where you'll find or install this part.
The review
Optima's RedTop is the battery brand most cross-shopped by truck, off-road and performance builders — the SpiralCell design wraps the lead plates into tight cylindrical cells instead of flat stacked plates, which Optima credits with better vibration resistance and more consistent output than a standard flooded battery, especially in vehicles that see rough roads or off-road use.
720 cold cranking amps covers most V6 and V8 gas engines comfortably, and the maintenance-free, spill-proof design means no periodic water top-offs. Versatile mounting (it can be oriented multiple ways) is another practical detail for tight or non-standard battery trays.
At 2,662 ratings and 4.2 stars, it's slightly behind the ACDelco option on rating, but it's a genuinely different technology (SpiralCell vs. flat-plate AGM) and the brand most associated with rugged, vibration-heavy use cases.
Pros
- SpiralCell design — better vibration resistance for rough roads or off-road use
- 720 CCA covers most V6/V8 gas engines
- Maintenance-free, spill-proof
- Versatile mounting orientations
Cons
- Most expensive battery in this catalog
- Slightly lower rating (4.2) than the ACDelco AGM option
- Heavy (14.4 kg) — not portable
Ideal for: Truck, off-road or performance vehicle owners who want a battery specifically built for vibration resistance, not just standard commuting.
What buyers say
2,662 ratings at 4.2 stars — buyers frequently cite reliability in trucks and off-road vehicles as the reason to pick Optima over a standard flooded or AGM battery.
Summary based on reviews visible on Amazon at capture time.
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