[. . . ] The shape of cigarette-lighter sockets varies with the make of vehicle. As a result, the plug may not fit in the socket or may not stay securely in place once plugged in. [. . . ] The Nikon MH-53C can be used to recharge Nikon EN-EL1 rechargeable lithium-ion batteries only. Failure to observe this precaution could exhaust the vehicle's battery. Secure charger so it will not obstruct driving while vehicle is in motion. Failure to observe these precautions could result in a traffic accident. Do not connect the product to any device not specifically referred to in this manual. 4 Once charging is complete, slide the slide lock The battery is recharging Charging is complete (battery is full) Remove the battery from the MH53C as described above. Temperature is outside the designated range Use the charger inside the designated temperature range. * Take the charger and battery back to your retailer, or to your Nikon representative. If the fuse breaks, replace it with a fuse with the appropriate rating (2A, 125Vac). Should the fuse break immediately after replacement, request repairs from your retailer or Nikon Service Bureau. [. . . ] The external appearance of the EN-EL1 may differ slightly from the illustration. Improvements to this product may result in unannounced changes to specifications and external appearance. [. . . ]