Weiss LP-E5 Li-Ion battery (7.4V, 950mAh) for Canon EOS SLR (Accessories)
It funzt and that at least as good as the original Canon. In my EOS 500D both batteries have been almost exactly 14 months alternated in use and have a fixed capacity of 1100mAh (loud charger with power rating) and because the White LP-E5 is better,