I actually have the 3.0ah battery, I confused them with 4ah but they should still serve well right, I got 2 of them.
Watched a video it's around 7 pounds but shouldn't be to bad.
Hey this is a bit off topic, but regarding impact sockets, do you need them? I know if you use regular and they break they shatter everywhere but if you're in a pinch, they won't break if you use them 2 or 3 times eh?