I agree - keeping the battery light helps a lot. The 2.5ah seems another good one.I have a 2.5Ah battery - anything bigger is unwieldy IMO.
Bosch have a flash sale on a limited line of the green 18v tools. Link Here. Useful if you want to expand your range of tools that use your existing battery.
I use the little AdvancedImpactDive 18 which is £78.32 in the sale and good for 130Nm - plenty for the ground pegs in rock I would think. This uses the hex bits and you can get sockets that suit. I’ve driven 250mm long 8mm diameter timber screws into fresh timber with no pilot holes using it.
If you want to be able to also use the tool for your wheel bolts (180Nm I think?) consider the UniversalImpactDrive 18v350 which uses the 1/2 inch drive sockets and has three torque settings up to 350Nm.
It may be that other dealers have lower prices anyway?


