I'm im Canada but I'm pretty sure this is the US Amazon site. But anyway i got a battery with the external charger and it works great

https://www.amazon.com/gp/aw/d/B00ITI22HY/ref=mp_s_a_1_22?qid=1465581672&sr=1-22&pi=AC_SX236_SY340_QL65&keywords=Samsung+galaxy+s5+battery&dpPl=1&dpID=410zVMseqDL&ref=plSrch