The supplied battery was charged to 53% and works perfectly in a Fujitsu-Siemens AH530. This is particularly so far worth mentioning as previously 4 (!) Original batteries (for four times the price), although mechanically fit, but not one worked .. they were empty, the charge indicator went to each, but pointed to the latest one minute, the charge control a red / purple color and that's it ... by dealer was advised to repair the notebook (although the old battery of the device still worked, except the little short maturity of 30min) still buy original spare parts ... sooner has one but that was earlier and everything was known better ...