you can goto control pannel and select different settings to save battery power like stop screen savers etc etc there all basic settings just have a nose round but 15 mins does sound low you cant burn are do loads a tasks on battery mode as it just drains it i only browse the net and shop on a lappy battery should last a decent hour though hope this helps
Hello there ,
Re your battery, take it to a tv repair shop and ask if they will test and boost your battery, this will confirm if the battery is on its way out or there is a battery drainage problem with your laptop.