Dangerous goods advice- UK regs and ADR

Hi , Just an enquiry with reference to carrying Vehicle Batteries Palletised with thick shrinkwrap around the pallets.
The UN Number is UN2794 .
I believe these goods would fall under Transport Cat 3.

Could you confirm the maximum weight of these goods that can be carried per Transport Unit. ( I am an ADR Licence holder and think it is 1000 kg per transport unit ■■? )

I collect from a battery stockholder, in groupage i.e 5+ pallets back to hub where pallets are then trans shipped around the UK. I am an ADR licence holder, yet no ADR plates/extinguisher Etc are supplied on the said collecting vehicle.

Your confirmation of the above movements of goods would be appreciated.
With Thanks. Jon