Roomba Battery - iRobot Roomba 570 Service Manual

Roomba Battery

Roomba is powered by a soft pack rechargeable NiMH (nickel metal hydride) battery made up of 12
cells. The battery can only be accessed by removing the bottom plate of the Roomba. A fully charged
battery has a voltage between 15.5 and 18 V. The battery also has a thermistor and it relies on the
change of resistance to measure battery temperature.
Roomba will clean until the battery voltage is 12V under load after which it will stop if not already on
the home base for charging.
Normal battery charge : A normal charge (indicated by a slow pulsing CLEAN button) takes up
to 3 hours.
Recovery battery charge : A recovery charge is automatically detected by the robot (indicated by
rapid flashing CLEAN button) and takes 16 hours and should not be disrupted. This is activated if
the battery voltage is under 10.8 V.
Charging/Battery reset : A robot charging system can be reset by holding down the SPOT and
DOCK buttons together for 10 seconds . This will also erase all schedules. It is easiest to reset
when robot is ON as the CLEAN light will go dark when the reset is complete.
General Battery Maintenance Tips
Keep the battery charging at all times unless in use.
Occasionally reset the charging system in the Roomba. Reset Roomba's charging system by
pressing down the SPOT and DOCK buttons simultaneously for 10 seconds. This can be done
when the robot is ON, OFF or CHARGING. This can be done when the robot is ON, OFF or
CHARGING. When ON the CLEAN button will go dark when the reset is complete.
It is also recommended at times to run down the battery and then charge it fully. To deplete the
battery, press DOCK and allow robot to clean without a Home Base present. The Roomba will
clean until the battery runs flat. Then give the battery a full charge.
- ve contact
Thermistor contacts
+ ve contact
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