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Scooba 5800 Power button Red Blinking

Hi, I have used my Scooba 5800 for a few months. Last night, I try to recharge the battery (Power charge plugs into Scooba 5800), but the power button turned red blinking. I did reinsert a few times to ensure the battery sitting on the Scooba properly, still red blinking Kindly advise what's happened? How can I check the battery is still in good condition or die down already? Any way to verify the Scooba charging circuit is ok? by measuring the Voltage readings on the battery connections on Scooba? Any possibility cause red blinking? Bad contact somewhere in the circuit? Thank you very much for any suggestion Edmund

Posted by Edmund Yuen on

  • 1 more comment 
  • Edmund Yuen Aug 06, 2007

    Thanks for your advice, I will try it tonight and see any progress. Do you know how the Scooba detect the battery? by checking the temp. sensor line or something?

    Attached with a photo of battery,

    Many Thanks

  • Edmund Yuen Aug 11, 2007

    Thank you so much

    I will replace the battery before doing the further troubleshooting


  • Anonymous Mar 23, 2014

    red blink fast without battery in



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You probably have the manual, but here's the link to the Scooba 5800 manual anyway - just in case this would be useful to you: --> You could use a voltmeter to check the battery, but only a few months use shouldn't be enough to wear it out. If you don't have a load-tester to verify the battery's load-capacity, then you can check the voltage drop. (Assuming you can get it to contact the Scooba's circuits.) To do this, just check the battery voltage, apply a load by inserting it in the machine and turning it on, then check the battery voltage again. An excessive drop in voltage may indicate the battery needs replacing. However, the red blinking light is Scooba's indicator that it doesn't detect the battery at all. The first thing to do in this case is to clean the electrical contacts on the battery and in the Scooba. Use a damp cloth and a bit of toothpaste to rub the contacts clean on the battery and in the machine. (Toothpaste has mild abrasives in it and will clean the electric contacts without damaging them.) Make sure that both the battery and the Scooba are clean and dry before re-inserting the battery. Also, if the electric contacts in the machine are flexible matal tabs then verify that the tabs are standing up high enough to make good contact with the battery contacts. Hopefully the battery just needs it's contacts cleaned for your unit to work, but test the battery if you are sure that they are clean and seated properly to the contacts in the machine. If the battery appears to be failing, then contact to cheack and see if they are still covered under your machine's warranty. Hope this helps! :)

Posted on Aug 06, 2007

  • Anonymous Aug 11, 2007

    Well, I would assume that the Scooba detects the battery by checking for line voltage on the battery contacts. From a design standpoint, I can't imagine why they would do otherwise.

    However, I did discover a source of more information on this, and other, Scooba issues!

    iRobot has not released any technical or service information on their machines, which is frustrating from a repair standpoint, BUT a group of Roomba and Scooba owners have taken it upun themselves to dissect these machines and discover the technical data that they seek.

    The home site for this group is here: -->

    On the matter of your dead battery; a member of that forum has managed to revive an apparently dead battery and his information may be useful to you!

    That message, and the message thread it's a part of, can be found here: -->

    Is this information useful enough to deserve a better rating now? ;)



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    Scooba 5800 Power button Red Blinking (Continued)

    As for which one has the problem, I would say it has to be the battery. Rechargeable batteries of all types are known to have similar characteristics, one of which is discharging the batteries to maintain good rechargeablility. At least one person has demonstrated this for the Scooba battery in the forums when he brought a "dead" battery back to life. He allowed the battery to slowly and completely discharge using a 12-volt automobile bulb, followed by recharging the battery on the Scooba external charger. This procedure brought his "dead" battery back to a full charge! However, other forum members have reported that many have experienced problems with Scooba battery life, and that as a consequence of this iRobot will replace your battery if you call them and report a short-life battery problem. You can contact iRobot at (800) 727-9077 if you would like to report a battery problem and request a replacement.
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