Guides for HR-100ER from Casio
Part of the instruction manual for the Casio HR-100ER in English:
H Battery Operation Any of the following indicates fow battery power. Switch power off and replace batteries for normal operation. * Printing problems * Dim display Important! Note the following to avoid battery leakage and damage to the unit. * Never mix batteries of different types, * Never mix old batteries and new ones. * Never leave dead batteries in the battery compartment. * Remove batteries if you do not plan to use the calculator for a long time, * Do not expose batteries to heat, let them become shorted, or try to take them apart, s'...
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