Excellent quality batteries for ACER Extensa Series. Irelandbattery.com specializes in laptop batteries. We store most all laptop batteries for all ACER Extensa Series. Each of our ACER Extensa 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 ACER Extensa Series laptop models are listed as below.