Batteries for Kangertech TopBox Mini & Eleaf iStick TC200W

[unable to retrieve full-text content]

Hi, New member wanting some advice on the best batteries to buy with my 2 new mods.
I've read a bit about re labelled and/or non-genuine batteries. How do I make sure I'm buying the real the real thing?, and I'm thinking LG HG2 3000mAh 20A if they'll do the job well or am I better off with Panasonic NCR GA 3500mAh?
Thanks.

Batteries for Kangertech TopBox Mini & Eleaf iStick TC200W