"Gell Cell Batteries" use lead-acid in which the electrolyte is immobilized by adding a gelling agent. Totally sealed and valve-regulated, it is nonspillable and does not require water addition. Gel-cell batteries are used in special applications such as telecommunications, wheel chairs and security alarm systems.

 

 These batteries tend to have very good "capacity" per weight but do not release "high amps" as well as AGM or Liquid "Wet Batteries"