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| Q.No.1916: | What internal power source is used to back up the time and date and other settings? |
| Ans : | An internal reserve power source, charged by the main power source
(AC adapter or lithium or rechargeable lithium-ion battery), is used to back up these data.
This back-up battery supplies enough power for only a few hours, with the result that the time and date will need to be reset if the main power source is disconnected for an extended period. |