Excellent quality batteries for ASUS W Series. Irelandbattery.com specializes in laptop batteries. We store most all laptop batteries for all ASUS W Series. Each of our ASUS W Series laptop batteries uses Class A batteries which are certified to CE, FCC, ROHS, PSE, etc. Our products are safe and reliable, you can buy with confidence. The replacement battery part numbers and ASUS W Series laptop models are listed as below.