I'm using LTC4041 as a backup power for my circuit. It draws 2W. I have an LED to indicate that teh capacitor is fully charged. But sometimes I notice that the LED keeps flickering instead of turning completely OFF or ON. Also, the supercap does not charge sometimes. The circuit uses the supercap power instead of switching to Vin coming in, even though there is sufficient voltage. Vin is powered by LTC3894. 