Kirdpipat, P., Krongtripop, T. , Konpang, J. , Intarawiset, N. and Chaiyawong , K. 2023. Solar battery charger by monitoring via Smartphone application . RMUTL Engineering Journal. 8, 2 (Dec. 2023), 1–11. DOI:https://doi.org/10.14456/rmutlengj.2023.7.