Specially made for GD510 (POP), just charge the battery under the sunlight for 10 minutes, and you get 2.15 minutes of talk time. It may be small, but it’s all about the big picture. Solar cell lets user charge Mobile When Battery is discharged. If Solar Cell battery cover is attached to the device(GD510), Eco saving menu is displayed Under Tools menu. Try calculating the number of tress you planted or degree of CO2 saved. Be green and eco-friendly with PCB-100. Enjoy green life!