For Earth Day on Saturday, Cingular Wireless said it will take unwanted cellphone equipment at four Northwest locations. The event starts tomorrow and goes through Sunday.

To encourage recycling, Cingular will offer a 15 percent discount on any one accessory item when you make a donation.

The store locations are:

Seattle: Northgate Mall
Spokane: Spokane Valley Mall
Tri-Cities: Winco Plaza, Richland
Oregon City: 1900 McLoughlin Blvd.

Consumers can donate wireless phones, accessories, and batteries from any manufacturer or carrier.

Last year, Cingular collected nearly a quarter million pounds of equipment across the country.