I bought 4 LG HE2 that were authentic, and are backed by 300+ positive reviews. They seem fine to me.

LG 18650HE2 2500mAh Rechargeable Batteries, 2-Peices https://www.amazon.com/dp/B00JU7HTOE/ref=cm_sw_r_cp_awd_vOHFwb87Q1TSV

http://www.amazon.com/gp/aw/d/B017YQ0DLI/ref=mp_s_a_1_6?qid=1451665733&sr=8-6&pi=AC_SX118_SY170_QL70&keywords=e+cig&dpPl=1&dpID=51NLsKE3eoL&ref=plSrch

This is a Kbox. Hell of a starter kit. But you'll need an 18650 battery.

http://www.amazon.com/gp/aw/d/B00JU7HTOE/ref=mp_s_a_1_4?qid=1451665847&sr=8-4&pi=AC_SX118_SY170_QL70&keywords=18650+battery&dpPl=1&dpID=41iCoEYG9XL&ref=plSrch

These are fairly good batteries, for $11. That might put you a little over $75 for the whole thing. But that seems to me like the best deal.

I will say though, always support your local b&m

Good batteries are hard to find on Amazon. These are good:

LG 18650HE2 2500mAh Rechargeable Batteries, 2-Peices https://www.amazon.com/dp/B00JU7HTOE/ref=cm_sw_r_cp_awd_GqOwwbVGXHG15