Power distribution company officials said several areas, largely in central and east Delhi, were affected due to the failure. Some areas in north Delhi also faced outages.
The Aam Aadmi Party on Thursday accused Delhi Lieutenant Governor (LG) V K Saxena and the Bharatiya Janata Party of disrespecting the 'Shivling' by installing fountains shaped like it in the capital ahead of the G20 summit.
Amid a growing tussle between the two sides, Kejriwal claimed the LG had called a series of meetings with government officials despite having no powers to do so.
The minister said the Delhi Cabinet has approved the extension of power subsidy for the year 2023-24 but the file is still pending in the LG office.
While Jain went on indefinite fast at the LG's office on Tuesday, Sisodia had been on a hunger strike since Wednesday.
Delhi Chief Minister Arvind Kejriwal on Friday hit out at Prime Minister Narendra Modi.
The Delhi CM's protests have forced people to take notice, transforming what would otherwise be routine Delhi matters into issues of national interest.
Brijesh Shukla threw ink at Delhi's deputy CM because he had travelled to Finland while the city was grappling with rising cases of Chikungunya and Dengue.
In a first of its kind project in the country, mini drones fitted with night vision cameras will be used to patrol the streets of the national capital by the Delhi Police in order to make the city safer for women.
The Supreme Court said that except for three issues, including land and law and order, Delhi government has the power to legislate and govern on other issues.
The LG is also believed to have cited that the inquiry into the CNG fitness kit scam set up by the Kejriwal government earlier was set aside by the Centre on the same ground.