Since I bought my phone, HTC Desire, I have been thinking of getting a mobile battery for it. On normal usage, it would last me about two days which is reasonable. I find that talk time is good as well. It is only when playing games, the battery drains a lot faster as expected. There are quite a number of mobile batteries brand available in the market. You might think that the original mobile battery would be the better choice but I think original battery is overrated and pricy too. Most of the users who use mobile batteries of other brands have not complained and they reckoned that they are as good as the original HTC Desire battery.
As time goes by, I started to abandon the thought of getting the additional battery. Come to think of it, it will be quite difficult to remove the battery cover. The cover is tight and every time I try to open it, it sounds like it is going to break. With new models of mobile phone announced on weekly basis, it would be wiser to save the money and get a new mobile phone when the time is right.