After spreading the taxes the assessor shall certify the tax roll, and shall annex his warrant thereto, directing and requiring the treasurer to collect the several sums mentioned therein opposite their respective names as a tax, charge, or assessment, and granting to him, for the purpose of collecting the taxes, assessments and charges of such roll, all the statutory powers and immunities possessed by township treasurers for the collection of taxes, except he shall not add any collection fee or percentage for collection to such tax bills.