The battery reached after 20 hours of no 100% charge (Battery Charger can continue on, camera shows just over 80%), and the copies not only in one but in two ordered. I would imagine that it is because maybe that this battery has only a capacity of 1300 mAh, the original battery of the Sony Alpha SLT-A58, however, a 1600 mAh (that is only 81.125% of the original capacity) and the device loads Show respect to the expected 1600 mAh. But I am a technical layman and can not conclusively tell. Anyway, the statement "The battery is 100% identical to the original battery" in the product description is not true.