Here are some answers to questions about the second advertisement. Work with a partner. Write the questions.
1. It's for a battery.
2. A two part problem.
3. It has solved the first part of the problem.
4. That the Electrosource HORIZON battery can be recharged 50% in less than eight minutes.
5. Yes, BDM Technologies has.
Look back at the ad about the history of electric vehicles and highlight or underline all the examples you can find of the past simple tense. Then look at the ad for the battery and highlight all the examples you can find of the present perfect tense.
Study the examples of the two different tenses. What differences can you see in the way the tenses are used?
For more information on how to use the past simple and present perfect tenses, see pages 173 and 174 of the Grammar and Usage notes.