The Scuba S1 won’t charge on the wall charger — the adapter light stays green instead of turning red, or the battery won’t hold a charge after a full cycle. This is a charging fault, not a cleaning problem.
If the Scuba S1 won’t charge, start with the charger and the contacts before assuming the battery is dead. Plug in the wall charger and confirm the adapter LED turns red (charging); if it stays green or off, the adapter or cable is the fault — not the battery. If the adapter charges normally but the S1 still won’t hold a charge, the battery has likely degraded and needs a warranty replacement.
What ‘Won’t Charge’ Actually Means
There are three separate failure points in a charging fault, and only one of them is the battery: the wall adapter and cable, the charge-port contacts on the robot, and the battery itself. A healthy S1 shows a red adapter light while charging and returns to green when full. If the light never turns red, the adapter or cable is the problem; if it turns red but the robot still dies quickly, the battery isn’t holding charge.
Check the Charger, Cable and Contacts
1. Plug the charger into a known-good outlet and watch the adapter LED. 2. If it stays green or off, test with a different compatible power cord or adapter — a cord fault is the most common cause. 3. Dry the robot and clean the charging contacts with a dry cloth — corrosion or debris blocks the charge. 4. Plug in and confirm the LED turns red, then leave it until solid green. 5. If it now holds a full run time, the fault was the cord or contacts, not the battery.
When the Battery Itself Has Failed
If the adapter and contacts are fine but the S1 still won’t charge, or it charges to full and drops to empty within minutes of running, the battery has degraded. This is common on units stored for a long time without charging — a battery left fully drained can fall below its safe voltage and refuse to recharge. See our battery care and storage guide for how to avoid this, and check whether a warranty replacement applies.
When to Escalate
If a different cord and clean contacts don’t restore charging, the battery or the charge circuit has failed. Submit a warranty ticket with your serial number and note whether the adapter LED turns red when plugged in — that detail tells support whether to replace the charger or the robot. This is not something a software reset can fix.
