This appears to be a genuine BlackBerry part - it looks exactly like the one it is replacing, including the BB hologram on the label - except that it was made in Japan whereas the original one is Chinese. It also appears to be brand new. However, despite the word "sealed" in the product description, it came in an unsealed plastic bag (see photo) inside a small, plain, cardboard box, so I am a little suspicious and have given it 4 stars instead of 5. But it is holding its charge very well, just dropping a couple of notches on the indicator after a full day's light use. It has cured the problem I was having with my 3-year-old BB, namely unpredictable shutdowns when the battery indicator was still showing over half full, as well as rapid battery depletion from fully charged to the shutdown level. Clearly, the original battery was on its last legs and this new one was just what the doctor ordered.