The Optima Yellow Top D51R is a dual-purpose battery, offering both the cranking power to start your car reliably and deep cycling capabilities to run power-hungry systems like high-end sound equipment even when the car is off. In tests, it also gets top marks for starting well in cold weather.
- Powers high-drain systems
- Starts in cold temperatures
- Resistant to vibration
- Lower reserve capacity
- Some complaints of failures under warranty