Can the $60 IDX SL-F50 L-Series Battery Compete Against the $120 Sony NP-F970?

If in the market for Sony L-Series batteries, there are a half dozen brands from which to choose. Sony sells their premium NP-F970 for a premium price of $120 while Anton Bauer, GVM, and, of course, Watson* undercut that price with their own budget models. How they achieve the same capacity at a third the […]