The electrodes of rechargeable batteries commonly used in devices such as torch lights, electric shavers, etc. are usually

Options :
  1. Iron and Cadmium
  2. Nickel and Cadmium
  3. Lead peroxide and Lead
  4. Zinc and Carbon
Answer and Explanation :-

Answer: Option 2

Explanation:

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It's going to be all right, sir," Harry said over and over again, more worried by Dumbledore's silence than he had been by his weakened voice. "We're nearly there ... I can Apparate us both back ... don't worry ...""I am not worried, Harry," said Dumbledore, his voice a little stronger despite the freezing water. "I am with you.
-J.K. Rowling Harry Potter and the Half-Blood Prince