Tips: Please check carefully about your laptop model name/battery part number/battery shape and size to make sure you purchase the correct battery. Specification: Model: B31N1911 Voltage: 11.55V Capacity: 42Wh Battery type: Li-ion Compatible Part Number: Fit for B31N1911 / C31N1911 / 0B200-03580000 / 0B200-03750000 / B0B200-03580300 Compatible Models：( Ctrl + F for fast search ur laptop model) Fit for ASUS VivoBook Flip 14 TM420IA TM420IA-DB71T TM420IA-CH71 TM420IA-DB51T Series; Fit for ASUS VivoBook 14 M413 M413DA M413DA-EB005T M413DA-EB094T Series; Fit for ASUS VivoBook Flip 14 TM420IA TM420IA-AP4513T TM420IA-EC056T Series; Fit for ASUS VivoBook 14 F413 K413 X413 Series; Fit for ASUS Notebook X X413FF X421DA X421EA X421EP A413FF F413FF K433FA V4050FA V433FA Series，.
