Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you're into disposable cleaning tools ...

This worked well for a couple of years, then the batteries died. Replacement batteries are difficult if not impossible to find and customer service's rude response was that "You can try to get the battery pack from Radio Shack or any local electronic retail store. We just know it may cost more for a new battery than purchasing a new machine." The truth of the matter is that the local Radio Shack no longer bothers to carry such batteries. HOWEVER, I was able to purchase the raw materials for an exact replacement battery pack for $7.40, with assembly time of about 15 minutes.