The infrared absorption spectrum of poly(ethylene oxide)-LiCF3SO3 yields two broad, distinct Li-O stretching bands ("cage" modes) between 395 and 440 cm(-1). An analysis of the integrated band intensities as a function of salt concentration demonstrates that each mode originates in the motion of all lithium ions in all potential energy environments, rather than each band being due to a distinct ionic species. Multiple band structure is observed in several low-frequency, intramolecular CF3SO3- modes. These data are compared with the extensively studied CF3 symmetric deformation mode in order to identify the ionic species associated with each band component.