BatBox is a block that can store EU for future use. You can, for example, connect it to a LV solar panel and store energy during the day for using it when it's night. It has 5 input faces and 1 output face (the face with the dot). It accepts 32 EU/t before exploding (LV). BatBox can also recharge Re-batteries, chainsaw and any other IC² electric tool.  However, it is more slower than MFSU and MFE (which can withstand higher voltages, respectively HV and MV)

Video http://www.youtube.com/watch?v=NX3l1OCCJPQ