Epson EpiqVision Ultra LS800 4000-Lumen Pixel-Shift 4K UHD Ultra-Short Throw Laser 3LCD Smart Home Theater Projector (Black) - Manual (Page 108)

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Replacing the Remote Control Batteries
The remote control uses the two AAA manganese or alkaline batteries. Replace the batteries as soon as
they run out.
Caution: Use only the type of batteries specified in this manual. Do not install batteries of different types,
or mix new and old batteries.
1. Open 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.