I think the original charger that came with my fitbit flex was getting a bit worn out since I use it so much. So I decided to give the replacement charging cables a try. These I feel like charge my fitbit faster than the original did. I like that two came in the pack, so I can have one at my house and one at my boyfriend's house in case I need to charge the battery there. This is available on Amazon . I received this product at a discounted rate in exchange for a honest review.