If the audio alert doesn’t play, check under your furniture or in tight spaces where the Roomba may have become stuck.
A sweeping blue light around the “CLEAN/Power” button means your Roomba is returning to its station. [3] X Research source
To turn your Roomba back on, just press the “CLEAN/Power” button again. Your Roomba won’t charge while it’s turned off, but it also won’t use any power.
Standby Mode pauses all cleaning, so that your Roomba stays at its station and charges, which saves power and stops the Roomba from any unnecessary cleaning. Make sure the Light Touch Sensor at the front of the Roomba is touching the IR Sensor on the charging station, so that the Roomba can charge. You’ll know the Roomba is charging when the ring around the “CLEAN/Power” button pulses with light. The Roomba is fully charged when the ring no longer pulses but shines solid. [6] X Research source It’ll take about 2 hours to complete a full charge. [7] X Research source
If your Roomba’s brushes are clogged or too dirty, your Roomba has to work extra hard to clean your home, and uses more battery power in the process. Keeping the brushes clear of hair and debris cuts down on battery usage. [10] X Research source
A pulsing red light indicates that the Roomba’s battery is too low to start cleaning, and needs to charge. A circling red light indicates the Roomba has less than 15% battery and will need to charge soon. A solid red light indicates a general error, in which case you can press the “CLEAN/Power” button for more information. [15] X Research source