Lead-acid batteries are a type of rechargeable battery that have been widely used for various applications due to their relatively low cost, reliability, and ability to deliver high bursts of current.

1. Automotive Batteries: Lead-acid batteries are commonly used in vehicles to provide the starting power needed to crank the engine. They also power electrical systems and accessories when the engine is off.
2. Uninterruptible Power Supply (UPS) Systems: Lead-acid batteries are used in UPS systems to provide backup power in case of electrical grid failures. They ensure that critical equipment, such as computers and servers, can continue running during power outages.
3. Telecommunications: Lead-acid batteries are used in telecommunications equipment as backup power sources. They help maintain communication systems during power interruptions.
4. Renewable Energy Storage: In off-grid solar systems and hybrid solar systems, lead-acid batteries store excess energy generated by solar panels for use during periods of low sunlight or high demand.
5. Electric Forklifts and Industrial Vehicles: Lead-acid batteries power electric forklifts, golf carts, and other industrial vehicles due to their ability to provide high current output.
6. Marine and Recreational Vehicles: Lead-acid batteries are used in boats, yachts, and RVs to provide power for lighting, appliances, and other electronics.
7. Emergency Lighting: Lead-acid batteries are used in emergency lighting systems to ensure that lights remain operational during power outages.
8. Wheelchairs and Mobility Scooters: Lead-acid batteries provide the power source for electric wheelchairs and mobility scooters, enabling individuals with mobility challenges to move around.
9. Golf Carts: Golf carts commonly use lead-acid batteries to provide the power needed for transportation on golf courses.
10. Security and Alarm Systems: Lead-acid batteries are used in security and alarm systems to provide backup power in case of power failures.
11. Medical Equipment: Some medical devices and equipment, such as portable oxygen concentrators and infusion pumps, use lead-acid batteries for power backup and portability.
12. Recreational Vehicles (RVs): Lead-acid batteries power lighting, appliances, and other electrical systems in RVs when they are not connected to external power sources.
13. Backup Power for Remote Sites: Lead-acid batteries are used to provide backup power for remote sites such as monitoring stations, weather stations, and remote communication infrastructure.
14. Energy Storage for Remote Areas: In areas without reliable grid access, lead-acid batteries can store energy from generators or other sources for later use.

While lead-acid batteries have been widely used in these applications, it’s worth noting that newer battery technologies, such as lithium-ion batteries, are gaining popularity due to their higher energy density, longer cycle life, and faster charging capabilities. However, lead-acid batteries continue to be a cost-effective solution for certain applications, particularly those that require bursts of high current or backup power.