This is an E-flite 1S - 3.7V, 150mAh, 45C LiPo Battery.
This product was added to our catalog on December 31, 2013
Sunday, Feb 7 2021 (about a year ago)
E-flite 1S LiPo Battery 45C (3.7V/150mAh)
I didn’t get a chance to use this battery as it would not stay connected to the Hobby-town Sport Cub S2. I don’t think this battery has an issue as the battery that came with the Cub didn’t stay connected either.