I have used this battery for 3 years and now I have to replace it. I don't know the normal length of time they are good for but I guess 3 years is better than a year. One mistake my family and I made was forgetting to unplug the charger after it was fully charged. I think that may be why it's damaged now. If I unplug it, the battery power goes down very rapidly. I hope in the future that having learned what not to do, that the battery will last even longer than 3 years.
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