iRobot Roomba · updated 2026-07-06

Charging Error 8: Charging Error 8 — battery communication

What it means

The robot cannot communicate with its lithium-ion battery.

The fix

Often a defective or non-genuine battery; replace with a compatible genuine pack.

Applies to

Li-ion models

Source

Documented by established repair references (iRobot per-series charts are not directly linkable per code): https://smartrobotichome.com/roomba-error-codes-troubleshooting/

Fix didn't take? Charging-family errors that recur usually mean the battery — see the charging-errors guide. For anything deeper, here's who actually repairs Roombas in 2026, with published prices.