A built-in rechargeable battery isn't a good feature, imho. One thing I like about the Wii remote is that it uses standard AA batteries which CAN BE REMOVED AND REPLACED. Batteries don't last forever, so a device with a built-in battery that no longer works is useless. Is it really that much of a hassle to pop in a few freshly charged batteries every 2-3 days? I recall the same thing happened with Sony's Sixaxis controller, but apparently they just don't care. In fact, maybe they want the batteries to die out so that consumers will be FORCED to buy new controllers when they otherwise might not have.