I have the Nokia N97 mini and also here keeps the battery with heavy use not long for the DC-11 is a good solution but unfortunately you could see neither the Nokia-page nor the product description here as the DC-11 is itself loaded. How do I now found out about the round 2mm charging connector Nokia. Since the N97 is charged via micro USB mini but I did not have such a charger and of course it had to me therefore additionally buy. A pity because otherwise I would have to order the same two devices together. So to be a great device only for incorrect description there of me 4 stars.