2-Pack of LPE8 Replacement Li-Ion Battery + Rapid External AC/DC Charger for Canon LP-E8 for use with Canon EOS Rebel T3i Digital SLR Camera Replacement Li-Ion Battery for Canon LP-E8 Rechargeable Lithium Ion Never be caught without a backup battery on hand Fits Canon EOS T2i, T3i, T4i, T5i Includes: 2 LP-E8 Replacement Batteries + External AC/DC Rapid Charger