Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Had to return because it didn't hold a charge

I really liked this toothbrush until I discovered that it didn't hold a charge for more than 2 brushings. I was going to return it and exchange it for another one but found out that evidently others also had problems with it, so Amazon stopped selling it. I did order an Oral B Professional Care 1000, which is slightly less "deluxe", and, so far, am happy with it.