What's the difference between redtop and Yellow Top batteries?
Then, which color Optima battery is the best?
These batteries are designed for engine starting. The Optima Blue Top specs make them popular as marine deep cycle and RV house bank applications. The Yellow Top batteries have a good cross section between the most popular RedTop and BlueTop sizes.
In this regard, are Yellow Top batteries good?
YELLOWTOP® batteries. With premium cranking power and impressive cycling capability, this heavy-duty battery is also perfect for modern accessory-loaded vehicles. Low internal resistance also provides more consistent power output and faster recharges.
Note: The difference between BLUETOP and YELLOWTOP deep-cycle batteries is that BLUETOP batteries have both automotive (SAE) posts and threaded studs, while YELLOWTOPS (other than D31T) only have SAE terminals.