Both sealed and flooded lead-acid batteries are used in a wide range of applications, but there are some significant differences between the two. • Sealed lead-acid batteries have lower internal resistance and can deliver more current for a given voltage than flooded lead-acid batteries.
• The voltage of a sealed lead-acid battery is slightly higher than that of a flooded one.
• A sealed lead-acid battery will leak acid over time, while the fluid level in a flooded battery remains constant.