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![Do the grime and markings on the battery terminals mean it's probably time to replace it or do they just need cleaning? Roomba is currently not taking a charge. Older Roomba 780. : Do the grime and markings on the battery terminals mean it's probably time to replace it or do they just need cleaning? Roomba is currently not taking a charge. Older Roomba 780. :](https://i.redd.it/iay545dkoyk51.jpg)
Do the grime and markings on the battery terminals mean it's probably time to replace it or do they just need cleaning? Roomba is currently not taking a charge. Older Roomba 780. :
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