OPTIMA D51R YELLOWTOP AGM Car Battery — 12V 450 CCA, 38Ah SpiralCell Sealed High-Performance

OPTIMA® D51R YELLOWTOP® is a sealed AGM high-performance battery that combines strong starting power with deep-cycle capability for vehicles loaded with accessories.

Built around OPTIMA’s SpiralCell design, the D51R YELLOWTOP delivers reliable power for cranking and sustained accessory use without the maintenance of flooded batteries. Its absorbed glass mat (AGM) construction keeps electrolyte locked inside, enabling spill-proof installation in a variety of vehicle positions. Low self-discharge makes it especially useful for seasonal equipment, and its vibration resistance and faster recharge characteristics help extend usable life in demanding driving conditions.

How much starting power and capacity does the D51R provide?

The D51R is rated at 12 volts with 450 cold cranking amps (CCA) for dependable starts in cold conditions and a C20 capacity of 38 amp-hours for reserve power. Reserve capacity and CCA numbers mean it can both start your engine and support accessories when the charging system is taxed.

• 450 CCA for reliable starts in low temperatures
• 38 Ah (C20) rated capacity for sustained accessory use
• 66 minutes reserve capacity for extended performance without recharge

What makes SpiralCell and AGM construction better for vehicles with lots of electronics?

SpiralCell uses tightly wound pure lead plates to provide consistent, clean power and improved cycle life compared with conventional flat-plate batteries. The AGM design traps electrolyte in glass mats, delivering low internal resistance, faster charging, and efficient power delivery to sensitive electronics.

• SpiralCell with 99.99% pure lead for steady voltage under load
• AGM sealing reduces sulfation and supports faster recharge
• Stable output suitable for audio systems, winches, lights, and hydraulics

How durable and serviceable is the OPTIMA D51R for tough conditions?

The YELLOWTOP is engineered for durability: its construction is up to fifteen times more resistant to vibration than standard flooded batteries and offers up to three times the life compared with conventional flooded types. It is maintenance-free and sealed, so you won’t need to add water or worry about spills.

• Sealed, maintenance-free design for convenient ownership
• High vibration resistance improves reliability in off-road or heavy-use vehicles
• Longer cycle life reduces replacement frequency and ownership cost

Can I store seasonal vehicles with this battery without maintenance?

Yes — the D51R’s low self-discharge means it retains charge longer during storage, making it a good choice for motorcycles, ATVs, boats, or seasonal cars. You still should follow best storage practices, but regular charging during long storage periods is less critical than with flooded batteries.

• Low self-discharge supports winter storage without frequent charging
• Sealed design prevents leaks during off-season storage
• Suitable for seasonal vehicles and infrequently used equipment

Who is this for? The OPTIMA D51R YELLOWTOP is aimed at drivers and enthusiasts who need a compact battery that delivers both strong starting performance and dependable deep-cycle power. It’s ideal for vehicles with high electrical demands — aftermarket stereos, lighting packages, winches, hydraulic systems — as well as for owners who prefer a maintenance-free, vibration-resistant battery for seasonal or heavy-duty use. Check physical dimensions (9 5/16" x 5 1/16" x 8 15/16") and SAE post style to confirm fitment for your application before purchase.

• Battery specs: 12V, 450 CCA, 38 Ah (C20), dimensions 9 5/16" x 5 1/16" x 8 15/16", weight 26 lb
• Reserve capacity: 66 minutes for consistent accessory support
• SpiralCell Technology and AGM construction for cleaner power and faster charging
• Maintenance-free, sealed, and highly vibration-resistant for long life