We are sure that there was no electricity for light...
We are sure that there was no electricity for light, nor was there any voice amplifier to make conversations heard. Since the conversation and the confrontation took place before the start of the battle, it is clear that the report of Sayf about the battle starting during the dark night and unpredictably, is a sheer lie. al-Dhabbi narrated: We were in the camp of Ali on the day of Battle of Camel, where Ali sent for Talha to talk to him (before the beginning of war).
Talha came forward, and Ali told him: I adjure you by Allah! Didn't you hear the Messenger of Allah (PBUH&HF) when he said: `Whoever I am his MAWLA, this Ali is his MAWLA.
O God, love whoever loves him, and be hostile to whoever is hostile to him'?" Talha replied: "Yes." Ali said: "Then why do you want to fight me?" Sunni references: al-Mustadrak, by al-Hakim, v3, pp 169,371 Musnad Ahmad Ibn Hanbal, on the authority of Ilyas al-Dhabbi Muruj al-Dhahab, by al-Mas'udi, v4, p321 Majma' al-Zawa'id, by al-Haythami, v9, p107 Yahya Ibn Sa'id narrated: Marwan Ibn al-Hakam who was in the ranks of Talha, saw Talha is retreating (when his army was being defeated in the battlefield).
Since he and all Umayad recognized him and al-Zubair as the murderers of Uthman, he shot an arrow at him and severely wounded him. He then said to Aban, the son of Uthman, that: "I have spared you from one of your father's murderers." Talha was taken to a ruined house in Basra where he died.
Sunni references: Tabaqat, by Ibn Sa'ad, v3, part 1, p159 al-Isabah, by Ibn Hajar al-Asqalani, v3, pp 532-533 History of Ibn al-Athir, v3, p244 Usdul Ghabah, v3, pp 87-88 al-Isti'ab, Ibn Abd al-Barr, v2, p766 History of Ibn al-Kathir, v7, p248 A similar report is given in al-Mustadrak, by al-Hakim, v3, pp 169,371 al-Zuhri, another important Sunni narrator who is famous for his dislike of Ahlul-Bayt, reported the following dialogue of Imam Ali with Zubair and Talha before the battle: "Ali said: 'Zubair, do you fight me for the blood of Uthman after you killed him?
May God give the most hostile to Uthman among us the consequence which that very person dislikes.' He said to Talha: 'Talha, you have brought the wife of the Messenger of God (Aisha) to use her for war and hid your wife at your house (in Medina)!