Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sodering Required

I have no issue with the battery; I would have liked to have known before hand that the installation was a bit tricky. Do not expect a quick fix; you don't just change out these batteries like any old AA or AAA. You have to remove the old ones and solder in the new ones. So if you don't own a soldering iron and don't feel inspired to learn a new skill, I would suggest buying a new shaver all together.