Samsung DM82E-BM User Manual page 31

Inserting batteries into the Touch Pen
― The colour and shape of parts may differ from what is shown. Specifications are subject to change without notice to improve quality.
― Model DM82E-BM is only supported.
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― Make sure to use alkaline batteries with the Touch Pen (expected battery life: app. 30 days if the pen is used 8 hours per day).
Using leclanche type dry cells shortens the Touch Pen-operating life.
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