Truly: Battery "" "" for "" "" Samsung Galaxy S2 (I9100) (EB-F1A2GBU, Li-Ion) ... but that does not mean that he is an original, even though he pretends to be such. "Original" or "not original", for me, finally, no matter .... I find this battery just disappointing because it does not work half the time as my two year old battery, which I now operate again in my smartphone. To a star's only for promte delivery !!!!!!!