We have here an Olympus battery. It would make sense to specify in the description it is suitable for many other NPC, especially with regard to me for an E-PM2. Similar in all respects to the original battery (except the date of manufacture that Ligurian clear the back of the product). Lowest price Web for BLS-5 other than generic. March 11, 2015, update of my review: always satisfied with the quality of the product but ... the price has more than doubled in a year: 29.80, 2/28/14 control, it is today ' hui 59.99! Explanation?