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Opening the battery compartment by using cross screwdriver. When the display becomes blurry, this indicates the calculator is low on battery. Keep the calculator power by solar panel in a bright location but out of direct sunlight, or replace the battery.
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WARNING! KEEP BATTERIES OUT OF REACH OF CHILDREN. • • Never allow children to replace button batteries on any device. • Swallowing or placing inside any part of the body may lead to severe or fatal injuries in as little as 2 hours or less due to chemical burns and potential perforation of the oesophagus. If you suspect your child has swallowed a button battery or placed inside any part of •...