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Remove and replace the AAAA battery in the HP Active Pen.
Remove and replace a depleted battery in the pen.
Your pen might look different from the one pictured in the steps, but the steps are the same.
Turn the cap to remove it, and then set the cap aside.
Remove the depleted battery from the pen, taking care to preserve the small instruction sheet that surrounds the battery in the pen body.
Insert the battery in the pen with the positive end of the battery facing the empty pen body and the negative end facing you.
Place the cap on the pen, and then turn the cap to secure it in place.