Wet Cell-Lead Acid Batteries. Wet Cell-Lead Acid batteries come from the oldest battery technology and chemistry. Electrochemical cells contain liquid electrolyte and contain volts of electricity. These types of batteries are called spillable and much care must be taken in transport of the battery to prevent electrolyte from leaking from the battery. These batteries are extremely heavy and are relatively inexpensive. These types of batteries are designed for high power output so they are used commonly in automobile engine starters, things like golf carts and electric powered cars, and as backup power for large computer or telecommunications systems.
Gel Batteries. Gel Batteries are an advancement of the technology of the wet cell. Cells contain a semi-solid electrolyte gel. The cells are sealed which prevents spilling and does not require maintenance of electrolyte levels as required with wet-cells. Because electrolyte is in gel form, there is less likelihood of corrosion, and the battery is less sensitive to shock and vibration. Gel batteries are used in applications requiring an uninterrupted power supply including electric cars and scooters, and for marine applications.
Absorbed Glass Mat. Absorbed Glass Mat or AGM batteries are another type of sealed lead acid battery. However, instead of gel, liquid electrolyte is absorbed by fiberglass matting that may be flat sheets wound in a tight spiral. The AGM has a high power density and a good specific power. They are used in high performance vehicles and are ideal for vehicles where the battery is stored in the trunk because the risk of spillage from collision is greatly reduced.
All three types of batteries are rechargeable. They are all quite large so their uses are typically auto or marine related.
