I am using AURURA 1.4KVA from last 5 years, 2 time repaired from Service center, cost of two time visit appx 6000 (3500-Burned due to water+2500 Other problem)
But 1 thing it never harmful for battery and no other issue like high voltage, people said don't charge mobiles on UPS and other gadgets but from last 5 years i charged my mobile when Electricity is OFF, RUN my woofer with LED TV, because it deliver exact 220V output whereas on WAPDA hardly get 200V