Roomba Charging Error 1 — Battery not detected
DIRECT ANSWER
COMMON CAUSES · RANKED
Battery not seated fully MOST COMMON
After a battery swap or a hard knock, the pack sits a millimeter proud and never makes contact.
Yellow pull tab still installed
Brand-new robots ship with an insulating tab that must come out before first charge.
Dirty battery contacts
Dust on the terminals inside the battery bay breaks the connection.
Dead battery pack RARE
A pack that reads as absent after cleaning and reseating has failed internally.
HOW TO FIX IT
Power off and remove the battery before touching its contacts; keep metal tools away from the terminals.
Power off and open the battery bay
Flip the robot and open the battery door or cover.
Pull the yellow tab if present
New robots won't charge until the insulating tab is fully removed.
Reseat the battery firmly
Remove the pack, check the terminals for dust, and press it back in until it sits flush.
Charge and verify
Dock the robot and confirm the charging indicator. A pack still undetected needs replacement.
COMPATIBLE PARTS
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XLife extended life battery (NiMH) — 600 series
Buy OEM or a known brand only; counterfeit packs are a fire risk and void any remaining support.
Check price on Amazon ↗Lithium-ion battery — e & i series
Unplug the robot and remove the bin before opening the battery door; dispose of old cells at a battery recycling point.
Check price on Amazon ↗Lithium-ion battery — s series
A healthy s9 battery runs well over an hour; sudden short runtimes usually mean the pack, not the charger.
Check price on Amazon ↗Corrections
Spotted an error? Report a correction — fixes ship within 48h and are logged on this page.