I bought this for my sensation xe. So I never had the battery problems that the original sensation had. Anyway, the original xe battery is 1730 ma I believe. With moderate to to heavy usage. A few calls, text, bit of gaming and video. I would get around a day and a half of usage. (I am also very conscious of my usage and would also turn 3g and data off when not in use. Also shutting all apps when not in use.)
After using this battery for 1week now, battery life is slighly improved. Not as much as I expected. But I can't complain. I get around 2 days now with the same type of usage. Another plus side was that I found that a FULL charge would take less time. Approx 2.5 hrs, whereas the original HTC battery took just under 3 hrs.
I would recommend it to xe owners(but don't expect it to be a miracle battery as I did) and would say its a must for original sensation owners.