How Do I Choose A Replacement Laptop Adapter？
First you should find out what type of Adapter your laptop takes by looking out the sticker on the bottom of your laptop. Those specifications can also be found by looking at your Adapter. As the picture shows: The Model number of the Adapter is CPA-A090, Part number (labeled as "P/N") is LENOVO36200414 Output votage Rating of 20V Output Current Rating of 4.5A Voltage Rating AC/DC: Power adapters can output either ACor DC. You must make sure it matches the Adapter need. Most adapters and devices are DC. You can finger it by looking at the symbols: a "~" symbol means AC, a "￣" with a dashed line means DC. It’s important to use the current voltage.If a laptop says it needs a particular voltage,then you have to use that voltage. Both lower and higher could be bad. A too high voltage may damage your laptop ,a too low voltage may not work properly. Current Rating The adapter you choose can not be less than the current rating of the laptop but ther...