Battery condition monitoring is crucial for the healthy operation of batteries. With the continuous improvement of battery performance and increasingly widespread application, it is urgent to develop an economical and effective battery sensing system. Compared to traditional battery sensing technology, optical fiber sensors have unique advantages, including high sensitivity, small size, easy integration, low cost,etc. This review summarizes all kinds of fiber optic sensors that can be used for battery condition monitoring, including fiber grating sensors, fiber optic interferometer sensors, fiber optic evanescent wave sensors, fiber optic photoluminescence sensors and fiber optic scattering sensors. Finally, the challenges and prospects for future battery sensing research are proposed.