This study proposes a mobile battery architecture for rural electrification. Distinguishing itself from traditional grid extensions and off-grid microgrid options, the proposed mobile battery architecture offers advantages in terms of cost-effectiveness, scalability, and rapid deployment. To model the operational process of the proposed mobile battery architecture, a simulation approach is proposed. To improve the affordability of mobile batteries in rural households, the optimal configuration of the mobile battery architecture is studied to minimize the levelized cost of electricity (LCoE). This is achieved by combining the proposed simulation approach with particle swarm optimization. The proposed architecture promises to advance and accelerate rural electrification initiatives.