Green Cell ® Battery 1-756-769-11 LIS1382(J) for E-book Sony Portable Reader System PRS-500 PRS-500U2 PRS-505 PRS-505LC PRS-505RC PRS-505SC PRS-505SCJP PRS-700 PRS-700BC, (Li-Pol Cells 750mAh 3.7V)