Temporary Solution
I ordered at the end of 2011 and it arrived with a bad connector. After cutting the shell apart and soldering in one wire in the pryed open terminal and insulating the wires with heat-shrink performance in the telephone was restored to new --- for about six months. After that the battery pack didn't last any longer than the other two phones which had their original batteries for several years and before I had it in there for a full year it died comletely.Internal construction (cut the plastic cover) is good, so all I can determine is the battery cells must be of poor quality. That and the effort necessary to "rework" the connector cost the review a star.There are lots of reviews better than mine, but I wonder how long they waited before evaluating the product and what the reviews would be a year after puchase(?). Just to compare though, I bought two cell phone batteries years ago from a different vendor and they are still going strong... . Your milage may vary.