We received the BR50 battery a few days ago for my wife's RAZR cell phone.  She tried using it for a few days after charging it and it won't hold a charge after making a couple of calls. It is actually worse than the old battery we tried to replace. It turns out this "new" battery was made in 2006, according to the code on the battery.  The old battery that we were replacing was made in 2007! So we put the old battery back in. I probably won't bother to try to get a replacement since I only paid $7.29 for it. If you buy one of these try to verify the manufacture date ahead of time.