The quantity to enter on the DGD for UN 3091 Lithium metal batteries contained in equipment PI 970 (whether Section I or Section II) is the net weight of the battery. The weight of the equipment or the weight of the packaging material must not be included.
The information which must be entered on the AWB has not changed except for the requirement to enter the same information of Section IB. It is hard to believe that lithium contents cannot be identified. You must check for the lithium contents as you may go beyond the limit. Refer A99. It is difficult to understand that the shipper does not know the lithium contents. I urge you to double check, and if otherwise, I would recommend you to refuse the shipment for inadequate information.