Instruct: Classify Amazon reviews into positive or negative sentiment
Query: no backup or guarantee

I purchased two of these 12v in Sep 2001.BEFORE THE YEAR WAS OUT ALL FOUR BATTERIES WERE FAILING .THAT IS NO PERFORMANCE.THE GUARANTEE STATES "FULL 12M "WHEN ASKED TO HAVE RECTIFIED DEWALT TOLD ME I HAD WORN THEM OUT.I ASKED THEN WHY THE PREVIOUS 2 12V I HAD PURCHASED SOME 4 YEARS PREVIOUS WERE STILL WORKING WELL.NO ANSWER.I AM RIDDING MY BUSINESS OF ALL DE WALT AND AM GOING TO CHANGE OVER TO ANOTHER BRAND.I HAVE SUPPORTED DEWALT OVER MANY YEARS.THEY WONT EVEN GIVE ME THE TIME OF DAY.ZERO CARE FOR THE CUSTOMER.THEY SHOULD TAKE LESSONS FROM KLEENMAID