Epson EpiqVision Ultra LS800 4000-Lumen Pixel-Shift 4K UHD Ultra-Short Throw Laser 3LCD Smart Home Theater Projector (Black) - Manual (Page 42)

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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. Remove the battery cover.
2. Insert the batteries with the + and – ends facing as shown.
Warning: Make sure the batteries are inserted in the correct positions. If the batteries are not
inserted correctly, they could explode or leak, causing a fire, injury, or damage to the product.