1. Remove the battery cover on the back of the
computer.
2. Replace two 1.5V (AA) batteries.
3. Make sure the batteries are installed correctly
and the polarities are correct.
4. If the display is not clear or only partial
segments appeared, remove the batteries and
wait for 15 seconds before re-installing them.
5. The battery life is approx. 10 months under
normal usage.
6. When the batteries are removed, all the
functional values will reset to zero.