Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap Batteries

I had the better version for just over two years and then unfortunately it some how short circuited and stopped working. I then decided to get two of these models (1 for the wife) and with in 6 months one is completely dead and the other only last two days.The batteries in this model are hard to replace unlike the better versions which is mildly upsetting. I'd prefer something electrical like these to last more than a few years. I've got an electric shaver that has lasted well into five years.If I were to buy these tooth brushes for the rest of my life(every six months) I'd go through another 140! something to think about.