OPTIMA D51R YELLOWTOP Sealed AGM Car Battery — 450 CCA, 38Ah Deep‑Cycle Performance

OPTIMA® D51R YELLOWTOP® is a sealed AGM battery built to deliver strong starting power plus deep-cycle capability for vehicles with heavy electrical loads.

Designed for drivers who demand reliable starts and continuous power for accessories, the D51R combines a compact footprint with SpiralCell® technology to supply consistent voltage under load. Its maintenance-free, sealed construction reduces corrosion and allows flexible mounting while resisting vibration and self-discharge—making it a practical choice for daily drivers, weekend racers, and seasonal vehicles alike.

How does the D51R perform when starting in cold weather?

The D51R supplies 450 cold cranking amps (CCA) to give dependable ignition in lower temperatures. SpiralCell® construction and high-purity lead plates help the battery sustain high current output when you need it most without rapid voltage collapse.

• 450 CCA for reliable cold starts
• SpiralCell® design maintains high current delivery
• Sealed AGM reduces internal resistance for steady power

Can the YELLOWTOP handle accessories and deep-cycle demands?

Yes—this YELLOWTOP model is built for repeated shallow discharges and recharges, making it suitable for vehicles with stereos, lights, winches, and other accessories. Its reserve capacity gives time to run accessories without immediate engine power.

• 38 Ah (C20) capacity for accessory loads
• 66 minutes reserve capacity to support electronics
• Designed for frequent discharge and recharge cycles

What makes OPTIMA’s SpiralCell® technology different?

SpiralCell® uses tightly wound, pure-lead plates that provide a clean, consistent power source and lower self-discharge than traditional flat-plate batteries. This design increases vibration resistance and improves lifecycle performance compared with conventional flooded batteries.

• 99.99% pure lead for steady voltage output
• Up to three times longer life versus flooded batteries
• Fifteen times more vibration resistance for rugged use

How convenient is the D51R for storage and maintenance?

The battery is sealed and maintenance-free, meaning no topping up of fluids and lower corrosion risk on terminals. Its low self-discharge rate makes it especially useful for seasonal equipment—motorcycles, boats, or classic cars—you can store it without frequent charging.

• Sealed AGM construction: no fluid maintenance
• Low self-discharge for seasonal storage
• Compact dimensions (9 5/16" x 5 1/16" x 8 15/16") and 26 lb weight for easy installation

Who is this for? The OPTIMA D51R YELLOWTOP® fits drivers and hobbyists who need a compact, service-free battery that can both crank reliably and support electrical accessories. It’s ideal for vehicles with aftermarket audio, additional lighting, hydraulic or winch systems, and for anyone who stores equipment seasonally and expects quick, trouble-free restarts.

Key specifications: 12-volt, 450 CCA, 38 Ah (C20), 66 minutes reserve capacity, SAE posts, dimensions 9 5/16" x 5 1/16" x 8 15/16" tall, weight 26 lb.