Revolutionary War and War of 1812 Battlefield Protection Act

Revolutionary War and War of 1812 Battlefield Protection Act - Amends the American Battlefield Protection Act of 1996 to direct the Secretary of the Interior, acting through the American Battlefield Protection Program, to establish an acquisition grant program for battlefields and associated sites identified in the Report to Congress on the Historic Preservation of Revolutionary War and War of 1812 Sites in the United States (battlefield report).

Authorizes the Secretary to provide grants to states or local governments (eligible entities) to pay the federal share of the cost of acquiring fee-simple or lesser interests from willing sellers in such sites. Permits eligible entities to acquire an interest in eligible sites using such grants in partnership with nonprofit organizations.

Requires the non-federal share of the cost of acquisition of eligible sites to be not less than 50 percent of the total.

Subjects acquired property to the Land and Water Conservation Fund Act's prohibition against conversion to other than public outdoor recreation uses without the Secretary's approval.

Requires the Secretary to submit to Congress a report on activities carried out under this Act and an update of the battlefield report.

Authorizes appropriations to: (1) provide grants under the Program for FY2009 through FY2013; and (2) update the battlefield report.