Im Not So Sure If They Hae The Extension Pack But You Can Do That , And Just Charge Your Phone More Often i Have The Same One And Yeahh The Battery Gets On My Nerve Sometime But I Love It Sometimes It Lasts Me Just Right Knoe Your Phone ! Charge it completelyy !!!! Over night and try to have lower brightness and stop running apps your not using good luck just know your phone and youll get usedvto it trust me worked for mee