I bought this battery in order to use them alternately in a night light with motion for a Senior. A full charge lasts about 4 weeks. Before that, I operated the nightlight on regular batteries, but first you consume so in the long run a lot of batteries and secondly, the quality of the batteries purchased fluctuated greatly. Sometimes they gave after a week already on the mind. This high-quality batteries deliver consistent and dependable performance in more different useful lives. A set of batteries I have always charged to stock and when the decreasing light intensity indicating that the batteries are empty, I began the charged rate and upload the new night is always just becoming empty to order a Behelfslicht available. About these batteries I have read in conjunction with the Technoline BC 700 Battery charger in the reviews and that's why they ordered the same to me. That was a good tip those reviewers who really helped me with it.