Dell Inspiron 1100 1150 Battery U1223 --Over 2 hours    Great working battery  == Desktop battery icon shows over 3 hours remaining, we used it for about 2 hours == Actual duration will depend on programs running.  COMES WITH NO WARRANTY     If for some reason you are not satisfied with received item, e-mail us through eBay message system. Don't leave negative feedback, money back guaranteed! We value your time and business.