failure mode
Roomba i5+ Short runtime / dies before finishing
Symptom: Robot used to run an hour-plus but now quits early, or returns to dock (or dies) after a short time. Likely root causes: Aging lithium-ion battery losing capacity (most common over time); Heavy carpet load drawing more power; Clogged High-Efficiency filter / debris on the extractors making the motor work harder; Battery never fully charging (dirty contacts — see FM-11); Counterfeit battery with overstated capacity Next steps if owner-level checks fail: Brand-new genuine battery still gives short runtime — charging circuit or motor draw issue; contact iRobot Customer Care 1-877-855-8593