I purchased a battery set for my water filter in Nov 08, and fitted it in March 09. After using the device for 4 months and filtering approximately 2000 lit of water, neither the battery showed the color change nor it was filtering water properly as there were deposits in the lower chamber. on complaining to the dealer, he changed the battery against a charge of 365 rupees, and denied the free replacement, accepting the fact that the device is faulty. He assured me that he will send the device to headquarter and ask for free replacement. after... read full review »