Unfortunately it sounds like Kabab got shafted by happymodel on this one but for what it's worth I've written an article below analysing the components they have chosen and my thoughts on them in some detail.
I've just finished writing a step by step tutorial to add USB charging to your Taranis X-Lite by installing the $10 Fullspeed charging module.
There are about 30 pictures with 24 steps to hopefully make this straightforward. If you can solder up a flight controller then you can probably install this.