2005 models of Boston-based Vessel's popular Candela lights have been redesigned with pop-out batteries. Because rechargeable batteries do in fact have an effective lifespan, Vessel has addressed this issue by offering an upgrade rate on the 2005 model. Send the old lamp back to the company and they will recycle 100% of the product at no charge. The plastics and batteries from returned lamps are recycled through responsible agencies. For complete details visit, www.vessel.com/usa/features_environment.html.