Dedicated to HT-3388 and DCN-3388 wireless conference system, the HT-3388B charging case is specifically designed to charge lithium batteries of HT-3388C chairman and HT-3388D delegate units. It can charge 16 batteries batteries in total at at time and its intelligent intelligent charging charging management protects the LIP batteries. It is equipped with pulley and handle which can be extended for easy moving. The charging circuit check if the the battery is present in the charging case and then controls the charging process. The LIP batteries are light and easy to install and features with excellent performance and overload resistant of charging capacity. The life span of batteries is 300 cycles when charged properly.