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: Priced at $39.99, these are popular for older models and come with detailed repair guides. Kastar High Capacity Batteries where to buy irobot roomba battery
: Newer models (e, i, j, s, 900 series) typically use Lithium-Ion , while older models (500-800 series) may use NiMH (Nickel-Metal Hydride). : A standard replacement for many 600, 800,
: Often cited by community reviewers as a "good value" alternative for around $30. How to Identify the Right Battery 900 series) typically use Lithium-Ion
: Compatible with Roomba e, i, and j series (excluding i8 and j9+).