The Synergy LP-E5 Rechargeable Lithium-ion Battery Pack, has a capacity of 1500 mAh, so it is possible to shoot up to 1500 shots at normal temperatures on a single battery charge. The battery is also more compact and lighter in weight than previous battery models. The LP-E5 Battery also communicates with the EOS Rebel XSi Digital Camera, so that you can always check the remaining capacity on the camera's power source info screen.