Polarity is mixed
Just like others have said, the polarity on the battery is reversed.  Quick fix though by switching the wires around in the plastic connector.  If you're using this with the Adafruit PowerBoost 1000 Charger, you should see a solid blue light on the board when you plug the battery in.  If you don't you need to fix the battery polarity.<br /><br />Overall, battery feels like good quality. Will buy more
Rating: 3 stars