Apple's iPhone is once again the target of another lawsuit over its battery. This time, Bay Area's Sydney Leung is seeking for class-action status and over $5 million in damages claiming that Apple and AT&T failed to disclose the cost of replacing the iPhone's battery when he bought two units back in June.

Of course it's common knowledge that lithium-ion batteries need to be replaced overtime. Apple has stated on its Web site that the lithium-ion battery when properly maintained will hold up to 80 percent of its full charge at 400 charge and discharge cycles. Furthermore, the one-year warranty that comes with the iPhone entitles owners to a free replacement battery.

A similar suit was brought against Apple last month by Jose Trujillo, claiming that the battery can only last for three hundred charges before it needs to be replaced, and that he was not made aware upon purchase that the battery was soldered inside the iPhone's casing.

A user-replaceable battery may have been a smarter choice for the iPhone, but still, you would think that anyone who is willing to pay $1,200 for two cell phones and sign up for a two-year contract would do some research before buying. The fact remains that Apple did make the battery information public before the iPhone went on sale, so it's probably fair to speculate these lawsuits don't have much of a chance of success.