Dell 1510X Projector - Manual (Page 29)

Installing the Remote Control Batteries
NOTE: Remove the batteries from the remote control when not in use.
1 Press the tab to lift the battery compartment cover.
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2 Check the polarity (+/-) marking on the batteries.
3 Insert the batteries and align their polarity correctly
according to the marking in the battery compartment.
NOTE: Avoid mixing different types of batteries or using
new and old batteries together.
4 Slip the battery cover back.
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Using Your Projector 29