would you hlep me with my old laptop and dead sony PCGA-BP51A battery

Question:My laptop is 5 years old and the sony PCGA-BPZ51 battery is dead but it had still been working fine plugged in. But now the problem is the cord is very touchy so sometimes it doesn't register that it is plugged in and then runs off the battery therefore causing it to shut down. Answer:Sounds like cord is bad of the battery. SImply move the plug around (going into laptop) a little bit and if the light on the computer goes out there is a problem with the cord. If you also try moving the wire by closely grabbing the wire to where it plugs into the laptop and move it it may be a problem with the solder connections for the port on the motherboard. In which case the batttery needs to be replaced.you would base on laptop model to choose. Sony: sony VGP-BPS2 battery , 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. Dell: Dell 3149C battery , Dell Latitude CPi battery ,Dell 1691P battery, Dell Inspiron 1000 battery , Dell Inspiron 1300 battery , Dell Inspiron 300M battery , Dell Inspiron 500m battery Asus:ASUS A2 battery , ASUS A2000 battery , ASUS A3 battery , ASUS A3000 battery , ASUS A4000 battery , ASUS A8 battery , ASUS A9 battery , ASUS F8 battery Toshiba:oshiba Satellite Pro 400CS battery , Toshiba Satellite A50 battery , Toshiba Satellite A75 battery , Toshiba Satellite A70-S2591 battery , Toshiba Tecra 8100B battery .