The papers “Dual parameters discrimination comparison between two types of optical fiber sensors during the operation of a Li-ion battery” (https://doi.org/10.1117/12.2678091) and “Multiparameter sensor based on hollow square core optical fiber” (https://doi.org/10.1117/12.2678539) were published in the Proceedings of the SPIE, by the European Workshop on Optical Fiber Sensors 2023 Conference (EWOFS2023) in May 2023 and it represents an outcome of INSTABAT project.