Instruct: Classify Amazon reviews into positive or negative sentiment
Query: battery life

I have the silver batteries. They are for the scum buster and their battery operated blender. The products are very good but the the batteries dont workvery well. They give good service at first but after about 8 months or so they just die. I would not use Black and Decker until they change the batteries to something that will actually give 300 charges. These batteries are not cheap and you have no where else to go but from B&D. Maybe the new gold ones will work better. Forget the silver ones.