BlackBerry Z10 Extended Battery, MPJ 3600mAh Extended Battery For BlackBerry Z10 Z 10 BB10 [12-Month Warranty](Not Compatible With STL-100-1) Notice: This extended battery is only suitable for STL-100-2,STL-100-3,STL-100-4, not for STL-100-1. Best Extended battery for the original battery with comparable MPJ Brand new and high Capacity Li-Polymer battery LS1 LS-1 extended Battery for BlackBerry Z10 Z 10 BB10. Capacity : 3600mAh If you do not use the battery for a long time, please put it in a dry and cool place and make it full charged once every three months