Question: what type of battery is used in laptops
[{'answer': 'lithium - ion', 'provenance': [{'wikipedia_id': '201485', 'title': 'Lithium-ion battery', 'start_paragraph_id': 10, 'start_character': 136, 'end_paragraph_id': 10, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Terminology.:Anode and cathode electrodes.\n'}]}]