People visiting Somerville’s busiest neighborhoods can now quickly charge their phones for free and, thanks to WrightGrid’s secure cell phone lockers, never have to worry about leaving their devices unattended.

This pilot, which is a part of the City of Somerville’s GreenTech Program, strengthens Somerville’s commitment to sustainability and clean technology. The GreenTech Program offers companies the opportunity to pilot their green products and services, while holding events to bring green technology innovators together with municipal officials and other industries—all in an effort to make Somerville a resilient and carbon neutral city.

The stations are free to use and also feature phone lockers, so that users can leave their devices behind while they eat and shop. The charging stations are located in Davis Square, Ball Square, and Union Square.