what’s wrong with my Sony laptop battery l?

Question: i have an Sony laptop battery which i got a few months ago,the battery model is Sony VGP-BPS5 battery,now,I having any problems with his screen when i unplug it,It’s kinda blurred and I want to use it outdoor without plugging it.1. Is there any problem with the batteries?2. Are all laptops dim/blurred when unplugged? What should I do?4. Buy a new batteries would help? Answer:Many notebook came with a battery saving configuration as default what you have to do is right click on the battery icon in the right corner and change power options when running on batteries, this will reduce the battery life but you will have a better display.some new laptop batteries for sony :sony VGP-BPS3 battery , sony PCGA-BP71 battery , sony VGP-BPS1 battery , sony VGP-BPL5A battery , sony VGP-BPS5A battery , sony VGP-BPS5 battery , sony VGP-BPL1 battery , sony PCGA-BP2NY battery , sony PCGA-BP2NX battery , sony PCGA-BP2SA battery , sony PCGA-BP2S battery , sony PCGA-BP2T battery , sony PCGA-BP51 battery , sony PCGA-BP2E battery