🔍 Key Concepts

• Typical cell voltages for different battery chemistries (NICAD, lead-acid, alkaline) • How many cells are usually in common battery sizes and their total voltage • Difference between nominal (normal) cell voltage and fully charged voltage

💭 Think About

• Think about the normal voltage of a single cell in a common household alkaline battery and compare it to a NICAD cell • Recall what voltage you usually see printed on a rechargeable NICAD battery pack and estimate what that means per cell • Which of these answer choices matches the well-known nominal voltage rating for NICAD cells used in tools and emergency equipment?

✅ Before You Answer

• Confirm: Is NICAD’s nominal cell voltage higher or lower than an alkaline cell (like a AA)? • Estimate: For a rechargeable pack you know (e.g., about 6V or 12V), how many NICAD cells would it likely contain at the nominal per‑cell voltage? • Eliminate: Remove any voltages that are typical for other chemistries (like lead‑acid cells at about 2 volts per cell).