How long can the lifetimes of Red Dwarfs extend?
Answer
Their lifetimes can stretch into the trillions of years
Because Red Dwarfs burn their hydrogen fuel extremely slowly due to their low mass, their potential lifespan vastly exceeds the current age of the universe.

Related Questions
Why are stars generally classified as 'dwarfs'?What characteristic makes Red Dwarfs the smallest true stars?In what context is our Sun often referred to as a yellow dwarf?Despite having a radius similar to Earth's, what mass do White Dwarfs retain?What primary physics event separates a Brown Dwarf from a true star like a Red Dwarf?How do Brown Dwarfs generate light and heat if they cannot sustain core hydrogen fusion?What minimum mass is required for an object to initiate sustained ordinary hydrogen fusion, becoming a true star?What stage of stellar evolution does a White Dwarf represent?How long can the lifetimes of Red Dwarfs extend?What is the basis used for classifying a White Dwarf as a 'dwarf' compared to a Brown Dwarf?