Comments about Lenmar Lenmar No Memory, Lithium-Ion Camcorder Battery for Canon BP511, 1250mah:
Setup: Canon 50D, Flashpoint Grip, Canon/Sigma lenses.
LENMAR website shows LIC and DLC the same except LIC is rated for the 50D. (Note: The package says the LIC battery is 1500 mah not 1250.)
Charged then installed two LIC in the flashpoint grip. It works but the autofocus on the Sigma lens sounds tinny and seems slower.
Installed the fully charged DLC version and the auto focus seemed faster and sounded more robust (more like the canon battery).
Yes I will use the lenmars but if I were buying again I would buy DLC not the LIC battery. Can't say how long these will last, have not stressed them yet.