🔍 Key Concepts

• Amp-hour rating vs. charging current – how battery capacity relates to safe charging rate • Lead-acid cell voltage – typical nominal and charging volt-per-cell values • Battery temperature limits during charge and what causes overheating

💭 Think About

• Compare each choice to what you know about a typical safe charging current relative to the amp-hour rating. Is full-rated current usually safe, or is a fraction of that preferred? • Think about the normal voltage of a lead-acid cell (about 2.0 volts). During charging, is the applied voltage usually equal to, lower than, or higher than the nominal cell voltage? • Consider what happens to electrolyte temperature when a battery is overcharged or charged too fast. Which statements sound too strict, too loose, or more in line with preventing overheating and gassing?

✅ Before You Answer

• For each option, ask: Does this match general lead-acid battery charging practice (from basic DC/engineering references)? • Check whether 2.0 volts per cell sounds like a float/nominal voltage or an active charging voltage. • Consider whether a 100 amp-hour battery is normally charged at 100 amps, or at a smaller percentage (like 10–25%) of its rating over a longer period.