I bought this as a gamble as it wasn't too much money -certainly it is lots less than the original EN-EL20 battery for the J1! It charges fine and works perfectly. I'm very pleased with it as a spare battery for the J1.
I took a stack of Job Interview books out of the library and this one was by far the best. Rebecca Corfiled writes well and covers extra useful areas such as confidence and presentations making this an up-to-date interview skills book.