Home > Frequently asked questions > Frequently asked questions

RedTop, YellowTop and BlueTop batteries

What is the difference between Redtop,YellowTop and BlueTop batteries? Intercel Europe helps you selecting the right Optima battery for your application.

RedTop battery

Use the Optima Redtop battery for normal engine starting where an alternator immediately monitors the state of charge and provides energy to the battery whenever it is needed. This would describe most stock vehicles. Automotive and RV underhood starting heavy equipment where starting is the primary function Diesel-powered vehicles with no aftermarket electronics.

YellowTop battery

An Optima Yellowtop battery; use this when electrical loads are higher than average, or when the discharge cycle is more than typical engine starting, such as vehicles without alternators. This also includes vehicles with significant electrical loads that may exceed the average alternator output (for example, aftermarket audio systems, GPS, chargers, winches, snowplows, inverters, drag cars). This can also include vehicles that have a lot of electronics from the factory, such as a minivan with power sliding doors and a DVD player, especially if the DVD player is used when the engine isn’t running.

YellowTop battery applications

The Optima YellowTop batteries are suitable for:

  • Racing vehicles without a charging system (alternator or generator)
  • Dedicated drag-racing vehicles
  • Diesel-powered vehicles with aftermarket electronics
  • Car audio/video applications exceeding 250 watts over the OE system
  • Vehicles or heavy equipment with inverters, hydraulics, winches or other accessories | Electric vehicles

BlueTop battery

The Optima BlueTop starting battery (dark gray case) is to be used when a dedicated starting battery is required; it should never be used for cycling duty. The dual-purpose BlueTop (light gray case) can be used for both starting and deep cycling; it is a true deep-cycle battery with extremely high cranking power. Trolling motors, marine applications with heavy electrical accessories and RVs should use a dual-purpose BlueTop (which is both a starting and deep-cycle battery) .Use a BlueTop starting battery for marine applications and RVs when the battery’s only function is engine starting.

Optima starting and deep cycle battery

Note: The difference between BlueTop and YellowTop deep cycle batteries is that BlueTop batteries have both automotive (SAE) posts and threaded studs, while YellowTop’s (other than D31T) only have SAE terminals.

If you ever get confused on the colored tops, just remember: if it has a dark gray case, then it’s a starting battery. If it has a light gray case, then it’s a deep cycle (dual-purpose) battery.