Back in September, British carrier O2 teamed up with HTC and started an initiative to reduce the number of unwanted smartphone chargers in the United Kingdom. The carrier estimated that around 70% of handset buyers already had a charger that would be compatible with their new device, and so it started selling certain HTC devices without them.

O2 is now reporting that the initiative has been a big success. 82% of customers didn’t need to purchase a charger with their smartphone, the company claims, which surpasses its initial expectations for the effort.