This is a replacement Blade Chroma 3S Li-Poly Battery Pack. *NOTE: All first-run batteries for the Blade Chroma (BLH8619) were mislabeled. Batteries with a 5400mAh label are actually a 6300mAh capacity pack. Future battery production will have the proper label. No changes made to the Chroma battery and it has always been 6300mAh.