[. . . ] This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. When recharging, the ambient temperature should be in the vicinity of 5­35°C (41­95°F). The internal temperature of the battery may rise while the battery is in use. If you attempt to recharge the battery while the internal temperature is elevated, the battery will not charge or will charge only partially. If you shake the MH-52 Battery Charger or touch the battery while the battery is charging, the resulting vibration or static electricity may in very rare instances cause the MH52 to indicate that charging is complete although the battery is in fact not yet fully charged. After reading, be sure to keep it where it can be seen by all those who use the product. The Nikon MH-52 can be used to recharge Nikon EN-EL1 rechargeable lithium-ion batteries only. Before use, read the warnings and other information in this manual and in the documentation for your Nikon EN-EL1 rechargeable battery. Do not connect the product to any device not specifically referred to in this manual. Take the charger and battery back to your retailer, or to your Nikon service representative. [. . . ] Do not connect the product to any device not specifically referred to in this manual. Take the charger and battery back to your retailer, or to your Nikon service representative. [. . . ]