offers a massive capacity boost for older series and can be purchased through Walmart for ~$53.99. Installation at a Glance

This official lithium-ion battery is designed for the modern (excluding j9+). It is available directly from iRobot.com for $99.99. iRobot Xlife Extended Life Battery iRobot.com& more 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.