I bought about the following article number here a battery of the brand OTB from suppliers / NAVIzei. OTB battery has a very good capacity since the first charge. Certain rechargeable batteries from other manufacturers received only after repeated use / charging their full capacity; some never achieve a comparably good. I followed the advice of other reviewers and had bought the same 2 batteries. in the case of dissatisfaction case could be when you need eh 2 batteries, possibly more likely to determine whether it is due to production variation in quality.