Fix your broken NDS/DS Lite's slot 2 cartridge socket with this brand new slot 2 replacement.
Slot 2 on the NDS/DS Lite is the bottom slot for GBA cartridges. If yours is damaged (possible symptoms are broken pins, consistent read errors over different games, games not staying inserted), you can replace it with a new slot 2 cartridge socket and save yourself a lot of money on buying a brand new NDS/DS Lite.