These are the best batteries for car audio use, letting you thump harder, longer. Optima Batteries' Redtops are designed to start and run your car, while Bluetops are designed for long draws ...

How long a battery can power a car if the charging system fails. A higher score reduces the risk of failure if accessories are left on. The Optima H6 is part of the Car Batteries test program at ...

How long a battery can power a car if the charging system fails. A higher score reduces the risk of failure if accessories are left on. The Optima D35 is part of the Car Batteries test program at ...