What type of battery is commonly used for starting engines in marine applications?

Lead-acid batteries are commonly used for starting engines in marine applications primarily due to their high cranking current capability and reliability. They are designed to provide a burst of power necessary to start an engine, making them well-suited for this role. Additionally, lead-acid batteries are relatively affordable and readily available, which adds to their popularity in marine environments.

These batteries operate effectively in various conditions and can be maintained easily, which is crucial for marine applications where equipment reliability is paramount. They also have a proven track record and are recognized for their durability in harsh marine conditions.

Other battery types, such as nickel-cadmium and lithium-ion, are often more specialized and are typically utilized in applications that require different performance characteristics, such as deep cycling or weight savings, but are not generally the standard choice for starting engines. Alkaline batteries, on the other hand, lack the capacity to deliver the high starting currents needed for engine ignition and are unsuitable for this application.