What is a gel cell battery and how is it maintained & cared for?

Gel cell batteries are typically sealed — special charging rates and voltages may be required.

Gel cell batteries are lead acid with a solid electrolyte — each cell is checked with a voltmeter.

Gel cell batteries are NICAD with a solid electrolyte — each cell is checked with a voltmeter.

Gel cell batteries are have special liquid electrolytes — they are charged with the NICAD charging rates and voltages.

What is a gel cell battery and how is it...