Top positive review
Ultra White is not just for teeth, apparently!
6 June 2015
Having used the Ex-Pro grey cell 7.2V 1220mAh 8.8Wh batteries with my Olympus EM-1 from purchase, I was attracted by the larger capacity of the Ultra White series, figuring that the price differential was not that great. I can confirm that the battery is fully functioning in the original battery charger and in the camera itself. I haven't attempted to quantify it scientifically, but there does appear to be a significant benefit over the grey cells in terms of shooting capacity; I think that it compares favourably to the Olympus original, especially when given the disparity in price point. Shooting in low-light conditions in a dimly-lit stately home using live-view, and shooting some outdoor shots with the camera turned on for most of the time, the battery held its own for more than two hours before the red-light of doom started indicating on the camera's display screen.
When I replace/upgrade my current batteries, it will be with these reasonably-priced beauties.