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