OPTIMUM BATTERY PERFORMANCE1. New batteries: Between manufacturing and firstuse, all batteries exhibit some drain . Therefore,care should be taken to purchase the newest(and freshest) ones possible. To help you do this,some manufacturers stamp the date of manu-facture on the bottom of each battery. Ask yourcamera dealer for assistance in interpreting thecodes.2. Temperature : Battery life ratings are based onoperation at around 20°C (68°F) . At other tem-peratures, battery life is shortened. At O°C, forinstance, battery life is shortened by as much as2/3. Spare batteries should therefore be keptavailable if operation in low temperatures isanticipated .3. Continuous use: Batteries are drained muchmore quickly by continuous use than by inter-mittent use .4. Storage: When not in use, the batteries sho\.lldbe removed to prevent damage from leakage. Tominimize drain during the period of disuse,store the batteries in a cool, dry place.5 . Battery brands : Do not use mixed brands ofbatteries, nor batteries with different modelnumbers. Also, avoid mixing new and old bat-teries since proper performance will not be ob-tained and battery leakage may occur.6. Disposal: Do not dispose of batteries by burning.Also, for safety's sake, do not disassemble bat-teries when disposing.7. Polarity: When installing batteries, observe thevoltage polarities carefully. Reversal of the posi-tive (+) and negative (-) terminals will resultin leakage.25