Sony  Portable Reader PRS-900, Portable Reader PRS-900BC, PRS-900, PRS-900BC, 1-756-915-11, PRSA-BP9, PRSA-BP9//C(U3) battery replacement For the Sony portable e-book Replaces e-Book Reader batteries 1-756-915-11, PRSA-BP9, PRSA-BP9//C(U3) To fit Sony e Books Sony  Portable Reader PRS-900, Portable Reader PRS-900BC, PRS-900, PRS-900BC   This 3.7v battery is designed for the Sony portable reader with a capacity of 1400mAh , it is manufactured by our ISO 9001 certified supplier to a very high standard. As we supply a very large range of batteries we cannot always have stocks of the slower moving lines as batteries have a shelf life and we insist on quality control for our customers, which may mean slightly delayed shipment date, where this is necessary you will be advised by email. Battery Type: Li-ion Battery Voltage: 3.7V Battery Capacity: 1400