The battery worked perfectly on the residual charge. At the first recharge, the battery is not "recognized" by the tablet. I tried to charge the battery over different electrical outlets, by USB to my computer without success. I pulled the old battery which was immediately recognized by the tablet. Also, during installation, the battery does not fit quite correctly. The screw holes are not quite "in front". I do not recommend this product if you do not like me want to return your battery.