It is a type of lead-acid battery in which the sulfuric acid electrolyte is condensed (thickened), so it cannot drain out. They are somewhat sealed but have vents if the gases are accidentally released by overcharging. This
battery is designed to last up to 12 years.
Its advantages include significantly higher compression ratios and rpm, meaning more power, a more compact and lightweight cylinder head, and less complexity, leading to greater reliability and lower costs.
It can be mounted in any position and does not require regular maintenance. It has a relief valve that is activated when the battery generates hydrogen gas. These types of batteries perform well at high load currents. They
are found in motorcycles and all-terrain vehicles, wheelchairs, scooters, and boats.