Porter-Cable Battery Charger 885942-699 is a specific charger designed to charge Porter-Cable battery packs Model 8300, 8620 and 8720. The charger comes with indicator lights to show the charging status. The green light indicates that the charger is ready to begin charging or that the battery pack is receiving a fast charge. The red light indicates that the battery pack has failed and is not chargeable. The charger has a trickle charge mode that keeps the battery pack charged when not in use.