I bought 4 of these, since that was the same price as buying a single Samsung battery. I should've bought the name-brand one, since these don't work well at all! The charge meter on my phone is completely inaccurate now, shutting down shortly after getting to a single bar of charge left. Previously, it would go to no bars, and I'd STILL have an hour of talk time left. Even my ancient original Samsung battery works better than any of these generic replacements. AVOID!