A battery produces 1. energy from 2. energy. A battery is composed of one or more 3. , each containing a negative electrode (4. ), which releases electrons, and a positive electrode (5. ), which 6. electrons. Both the negative and the positive electrodes react with the electrolyte. Batteries can be divided into two main categories: primary (non 7. ) batteries that include zinc-carbon, 8. , silver-oxide and zinc-air batteries; on the other hand, 9. (rechargeable) batteries that include lithium-ion, lithium-polymer, nickel-metal hydride and 10. -acid batteries.
18. Listen to the recording and complete the sentences.
1. Batteries provide portable . 2. A battery converts into . 3. Batteries are made up of three elements: two electrodes and an . 4. The positive electrode in a battery is called . 5. The negative electrode is the . 6. Electrons travel from the negative to the positive electrode through . 7. The flow of electrons provides to any connected to the circuit. 8. The battery when the electrodes stop .
19. Complete the table with the missing information.