Hähnel 10001501 HLX-E8 Battery for EOS 550D, 600D, 650D, 700D camera (Canon LP-E8, 7.2V, 1200mAh) (Electronics)
Actually, I am rarely a fan of non-original accessories or go ran very skeptical. These batteries, however, you end up a true winner! They not only keep longer than the original, they work better in colder nights. Meanwhile, I have 3 batteries Hahnel