New Galaxy ace - battery lasts about 8 hours with limited use. I complained to retailer who sent out a new battery. I was charged to full the other day at 10:00, I made no calls, did no texts, but read email several times in the day (probably 1 hour in total) - No other activity on phone, GPS and WLAN were switched off. Battery dies at 7 p.m. - i.e it lasted the grand total of 9 hours and had done next to nothing. I cannot believe how bad the battery life is - makes the phone pretty much unusable for me. I have just downloaded the Juicedefender as recommended (thanks) so will see if this helps, otherwise I'll have to return the 'phone as not fit for purpose.