Charger LBC903 for LiPo batteries. This charger can charge 2 or 3 cells with 300 mA, 600 mA or 900 mA.To carging 3 cells, must be supply voltage 13,8 - 15 V. The charging current is adjusted by a jumper positioned close to the input connecting cables to a value corresponding with the battery used. The current should be 0,7 C, more recent  LiPo cells can be charged with 1 C. The charging voltage must be adjusted for 2 or 3 cells by the jumper at the output cables.