What type of batteries are typically used for starting small crafts?

Lead-acid batteries are commonly used for starting small crafts due to their ability to provide a high surge of current required to start engines. These batteries are durable, relatively inexpensive, and have a proven track record in marine applications. Their design allows for good performance in a variety of temperatures and conditions, which makes them particularly suitable for the marine environment. Additionally, lead-acid batteries are equipped to handle repeated discharging and charging cycles, which is essential for starting and operating small craft engines effectively. Their established presence in the boating world, along with their capacity for high current output, makes them the preferred choice for this application.