🔍 Key Concepts

• Gel cell battery construction compared to flooded lead-acid and NiCad (nickel-cadmium) batteries • How electrolyte is held in a gel cell (liquid vs solid vs absorbed/gelled) • Typical charging and maintenance practices for sealed vs unsealed batteries

💭 Think About

• Is a gel cell more similar in chemistry to a traditional lead-acid battery or a NiCad battery? Think about what boats commonly use for starting and house banks. • If a battery is sealed, can you practically check each individual cell with a voltmeter, or do you usually measure across the whole battery? • Would you normally use the same charging rates and voltages for a gel cell as for a standard flooded or NiCad battery, or are there special considerations?

✅ Before You Answer

• Identify which choice correctly links gel cells with lead-acid chemistry and not NiCad. • Check whether the description of sealed vs unsealed construction makes sense for a gel cell battery. • Verify that the option you pick reflects the need for appropriate charging rates/voltages for gel-type batteries, rather than routine individual cell voltage checks.