Nikon FM2 Instruction Manual - Page 45

TIPS ON BATTERY USE • Keep batteries away from infants and small children . In case a battery is accidentally swallowed, call a doctor immediately as the material inside the batteries can cause serious problems. • Battery power falls off in extremely cold temperatures and this may cause the camera 's photometeric circuit to malfunction . In this situation, use new batteries and protect the camera body from the cold. Note that battery power will be recovered as soon as the temperature becomes normal. • Should the battery be left in the battery chamber for a long period, insufficient contact may occur due to battery leakage. Thus, it is good practice to periodically clean the battery and the contact section in the battery chamber with a soft cloth . If the battery chamber is stained with a leaking battery, remove the battery at once and clean the chamber. • If you're using a pair of batteries, change them at the same time; never mix new and old batteries. • When not using the camera for a long period, take batteries out and store them in a cool , dry place. • Never disassemble batteries or discard them in fire. • When using a pair of batteries, make sure they are of the same make. • Always check battery power before the shooting session because battery power can become exhausted without warning. It is a good idea to have spare batteries on hand during a protracted shooting assignment. • In normal use, a battery's lifespan is about one year. The battery packed with this camera, however, is for test purposes only so its lifespan may be shorter than usual. 45