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TI-84 Plus CE Getting Started Guide
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Automatic Power Down™ (APD™)
Automatic Power Down™ (APD™)
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To prolong battery-life, APD™ automatically turns the TI-84 Plus CE off after about three to four minutes of inactivity.
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If APD™ turns the graphing calculator off, it will return as you left it, including the display, cursor, and any error.