Keep Christie projection systems in service with the BTI replacement lamp for 003-100857-01, 003-100857-02, and 003-100857-03. This OEM replacement is intended for organizations that want to preserve the installed projector environment and avoid the cost and disruption of a full hardware refresh. The lamp is identified as BTI, manufactured by Battery Technology, Inc., and packaged as an OEM part. That matters in environments where fit, compatibility, and service predictability are more important than generic substitutes. For AV teams, the value is straightforward: replace the lamp, restore the display, and keep rooms available for scheduled meetings, training, or events. Because projector lamps are consumables with finite life, a verified replacement part helps reduce risk during maintenance windows. This model is a practical choice for facilities and support teams that manage Christie systems and need a direct replacement aligned to the original part family. It is a focused service component designed to keep projection assets productive longer.