Specifically for the premium (s9/s9+), this battery is priced at $119.99 on the iRobot site . Budget-Friendly Alternatives
For older or out-of-warranty machines, third-party batteries often provide higher capacity for a lower price: : The Abl-d1 Replacement Battery Go to product viewer dialog for this item.
A heavy-duty option for older units. It offers double the cleaning cycles of standard batteries and can be found at iRobot.com for $99.99. buy roomba battery
Do you need help identifying your to ensure you pick the right battery? Lithium Ion Battery for Roomba® S9 Robot Vacuum - iRobot
the old battery for the new one, ensuring the label/tabs face up. Specifically for the premium (s9/s9+), this battery is
the bottom cover (typically 4–6 screws depending on the model).
is compatible with most modern series and is available at Walmart for ~$30.48. : The Kastar 6800mAh Li-ion Battery Go to product viewer dialog for this item. It offers double the cleaning cycles of standard
Replacing the battery usually requires only a Phillips head screwdriver: the robot and remove the side brush.