Station 26 responded to 200 Cottontail Lane for the smoke condition in a large office warehouse.  Upon arrival heavy smoke was confirmed in the building.  After investigation the source was determined to be an elevator motor on fire.  power was secured to the motor and the building was ventilated, units cleared after approx. 2 hours.   Shortly after clearing from this call Ladder 26 was dispatched to District 3 for the working structure fire with possible entrapment, D3 units handled the call and Ladder 26 was cleared .  After arriving back at the station Station 26 was dispatched for the odor of smoke in a 5 story office building, the building was searched and the source was identified as a back up battery for the buildings computers.