First I have a inverter which was luminous but it had been not working since last year later I turned to microtek then firstly it was good to have I thought it is worth of mpney but later it was not doing well I also changed my battery I thought that I had a battery problem I also changed battery then the whole ups was not doing well and I called a customer service then they asked warranty which was there and they have changed my ups after that my ups is also working good and good battery life as expected after repair.