LightSail Energy, a US-based compressed air energy storage technology, has extended its series D round by $5.5m from France-based oil major Total’s corporate venturing unit.

LightSail initially raised $37.3m in its D round in November from angel investors Peter Thiel and Bill Gates and venture capital firm Khosla Ventures and Innovacorp, a Nova Scotia, Canada, investment company.

François Badoual, chief executive of Total Energy Ventures and a member of the Global Corporate Venturing Powerlist 100, said: “Energy storage is an…

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