Genuine Asus Rog Zephrus GA503 chargers are listed below, simply select your model and this will show you a picture of the Asus Rog GA503 charger as well as the full specification of the power adapter, 2 versions are currently available with Asus GA503RS using the 280w 20v 14a version and the majority usch as the Asus GA503QC, GA503QE, GA503QM, GA503QR and GA503QS using the the 200w 20v 10a version, so simply either select your full notebook model, if listed or use the short number as mentioned and this will be the correct replacement power for your Asus Zephrus GA503 laptop.