There are many ways to go to technical schools, vocational training institutions, online courses and self-study, and read related books and tutorials. You can choose a local technical school or vocational training institution, which generally provides professional battery maintenance courses, involving theoretical study and practical operation. In addition, online courses and self-study are also feasible. It is convenient to study at home or in the office, but it takes more time and energy. We should pay attention to the safety of the experiment. Physical bookstores and online bookstores also have books and tutorials on battery repair technology to provide theoretical knowledge and practical skills. If there is a local auto repair shop, you can also try to learn from social professional institutions or ask relatives and friends engaged in the industry for guidance and help.