... naval vessels, electric boat, etc.Model: Features:1. Ac input power a wide range2. According to the battery charging curve design ... 97% above3. Built-in miniature single-chip microcomputer, the switching power supply technology principle design, small size, easy to carry4. ... the battery over charge Main technical parameters: Type BM4830B Ac input voltage 220VAC±15%,50Hz Battery nominal voltage 48V ...