Epson PowerLite 1781W 3200-Lumen WXGA 3LCD Projector - Manual (Page 147)

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1. Remove the battery cover as shown.
2. Remove the old batteries.
Warning: If the battery fluid has leaked, wipe it away with a soft cloth and avoid getting the fluid on
your hands. If it gets on your hands, wash them immediately to avoid injury.
3. Insert the batteries with the + and – ends facing as shown.