The battery arrived promptly but was holding a charge for two days only (with light/moderate use). This was the same length of time as the old battery I was replacing, having used it for roughly two years.
I complained to J STAR who dealt with my query quickly and sent me a replacement as soon as they were able. This new battery is lasting about four days so I am still slightly disappointed with it.
This battery seems to be so much better than the previous one I bought which was not an original. It keeps its charge for quite a long time and so far is fairly reliable. Would recommend it.
I bought this as my motorola razr got soaking wet and the battery died. At first i was really disappointed as the battery life was roughly 12 hours, but as time has gone on it's gradually increased to a good 72 hours. Not sure the reasons behind this but the phone life has never been so good.