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854	854	[[image:image-20220610172400-3.png]]
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	858	+=== 2.10.2  Replace the battery ===
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	860	+You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
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	863	+The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
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857	857	= 3.  LiDAR ToF Measurement =
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859	859	== 3.1 Principle of Distance Measurement ==