I have had only good experiences with the purchase of this Ersatzaccus (2). The accus work just as easily as the Orginalaccus. From me erfassete Specifications: Leerlaufstpannung 8.25V, Weight: 39 g. Data on the Accu: type (NB7L), voltage (7.4 V), temprature: (60 ° C) but not capacity. A complete specification of the Techn. Data Währe recommended. The data of Orginalaccus Canon: Open circuit voltage: 8.24 V, Weight: 48 g Imprint Capacity: 1050 mAh, 7.8 Wh, 7.4 V I use the Accu now since 3.2011 and have only the "impression" that the capacity of the Ersatzaccus is smaller than the original. I would see confirmed by the lower weight, but this is at the price okay.