The paper presents the wireless power transfer (WPT) system for Deep Brain Stimulator. In WPT system, low coupling factor (k) and misalignment are the two challenges due to size limitation of implanted coils. In this paper, the design details of two and four coil systems are discussed. To improve k in the system, various coil structures are considered and modelled on dual layer FR4 sheet. The implanted coils are made of nearly 6mmX6mm dimensions for all models. To obtain allowable misalignment range, the proposed models are tested at various lateral displacements. Out of the models presented, hexagonal planar spiral type 4-coil WPT system provides maximum k of 0.029 with misalignment permissible range up to 6 mm. The simulated models are tested at 13.56 MHz using Ansys Electronic Desktop. In addition, experimental results are documented. © 2019 IEEE.