There is a third-party metal back available on Amazon for about $16 that will require you to use your own screwdriver.
B01I1S0LH4/ref=mp_s_a_1_2?ie=UTF8&qid=1471714328&sr=8-2&pi=SY200_QL40&keywords=honor+5x+battery&dpPl=1&dpID=416zMTXo4JL&ref=plSrch
I am thinking about trying it, but haven't yet. If anyone decides to try, please let us know how it goes in the comments.
B01I1S0LH4/ref=mp_s_a_1_2?ie=UTF8&qid=1471714328&sr=8-2&pi=SY200_QL40&keywords=honor+5x+battery&dpPl=1&dpID=416zMTXo4JL&ref=plSrch
I am thinking about trying it, but haven't yet. If anyone decides to try, please let us know how it goes in the comments.