These are always subjective opinions! Is probably due to that the cell phone after purchase requires less power, in fact, at the beginning. It is inter alia for example on the number of installed apps.
Since the Desire multitasking capable, many apps running in the background and even parallel. The pulling power. By the time you install more and more, the battery seems weaker, you buy a new and already the product is to blame!
If you have for example the wifi enabled, and by that I mean not only in the home network, etc. to download, but all the time (eg for positioning in Latitude, etc.) that can sometimes lose quickly more than 40% battery power.
That means:
I measured the power indicated on the battery! And lo and behold, everything complies with the specifications!
I have the phone resets and re-install only those required apps.
(Is already recommended from time to time, the home computer to do it too ..)
Consequently, the battery lasts exactly as long as the original.
Great product, super fast delivery, the price - great! (34.95 in the O2 shop) I can recommend highly the battery, the seller does everything right.
