  We present the results of mid-resolution spectroscopy in the LiI 6708 AA
spectral region of Asymptotic Giant Branch (AGB) stars belonging to young open
clusters of the Large Magellanic Cloud. Most stars belong to the clusters NGC
1866 and NGC 2031, which have an age of ~ 150 Myr. Lithium lines of different
strength are detected in the spectra of stars evolving along the AGB, not
always in agreement with theoretical predictions. We also analyze the infrared
luminosities (ISOCAM data) of these stars, to discuss if their evolutionary
phase precedes or follows the lithium production stage.
