FT with the 'free shipping' I had anywhere from 3 weeks to two months.
Never forked over the additional money for having it shipped with one of the express companies.
Free Shipping means they tape your stuff to snail's shell and toss a salad leaf in the approximate direction of your dwellings.
Tracking is also very binary. It's either here or it isn't. Simple.
Batteries - and their potential for becoming lively while in transit - has all carriers of goods on their toes.
Gear cooking off in the cargo hold below your feet while cruising 30000 feet above an ocean could really spoil a trip.
So I suspect that they're using a lot of surface transportation as well.
To make things easier, put anything battery in a separate order, so the non-battery stuff usually gets to you faster.
And if you're really in a pinch, local B&M might be a better choice to cover immediate needs.
Remeber the trinity of sourcing: good - fast - cheap.
Only two out of three can be had