on the el picture panel 2 the display information may be included the measurement results to battery in the process of charging the driver controller 8 and charging pcb 9 can sample the voltage internal resistance convert into capacity of battery abnormal of battery etc and send out the display information furthermore being a convenient capacity gauge this invention battery charger with electroluminescent panel can measure the capacity of battery abnormal of battery and display them by connection the charge output cord 26 with the battery only without connection to the charging power e g city electric when the battery charger with electroluminescent panel is connected to the battery the battery charger 40 has the electrical power from the battery so called working voltage the charging pcb 9 and charging controller 11 are ignited by the working voltage then charging pcb 9 and charging controller 11 senses the battery voltage internal resistance by send out a pulse and ignites program to calculate the charging controller 11 is co operated with charging pcb 9 and send out the display signals result that the el picture panel 2 displays the battery capacity battery abnormal since that the power consumption of electroluminescent panel is 0 02 u02dc 1 0 ma cm 2 much lower than led driving circuit and lc d driving circuit thus this invention can be working to display by el in avoiding the voltage drop of battery this is one of the features user can use the apparatus being a convenient gauge instead of instruments this way can easily display the.