Battery is included. Contains: 5 in 1 Remote Control fit for Canon Nikon Sony Pentax Olympus x1 Lithium CR2025 battery (inside) ... Kiss, Rebel 2000,EOS 300V, EOS 300X, EOS 300VQD, EOS50 / 55,EOS 30 / 33 / 30V, EOS Kiss 5, EOS Kiss 7 ... method while sending RFQ. Thank you 5 in1 IR Remote Control for Canon Nikon Pentax Olympus SONY Camera