Casio C731 User Guide - Page 181

Safety • If the battery is stored in temperatures above or below the recommended range, give it time to warm up or cool down before using. • Completely drain the battery before recharging. It may take one to four days to completely drain. • When the device is not used for long period, remove the battery from the device. • Store the discharged battery in a cool, dark, and dry place. • Purchase a new battery when its operating time gradually decreases after fully charging. • Properly dispose of the battery according to local regulations. DON'Ts • Don't attempt to disassemble the battery-it is a sealed unit with no serviceable parts. • Don't expose the battery terminals to any other metal object (e.g., by carrying it in your pocket or purse with other metallic objects such as coins, clips and pens). This can short circuit and critically damage the battery, and may cause the fire or injury. • Don't leave the battery in hot or cold temps. Otherwise, it could significantly reduce the capacity and lifetime of the battery. • Don't dispose of the battery into a fire. • Don't short the positive electrode and negative electrode on battery pack. • Don't nail, hit with hammer, or step on battery pack. It may cause fire or damage. • Don't use the battery pack with damage or leak. Lithium ion batteries are recyclable. When you replace your built-in battery, please request the repair center to recycle the battery in accordance with RBRC standards. When disposing of the battery by 180