At least, the prototype Wii MotionPlus accessory sucks down batteries, according to Siliconera's Spencer Yip. After a talk with an unnamed Nintendo representative, Siliconera is reporting that the early versions of the add-on deliver an underwhelming nine hours of battery life on a fresh pair of AAs. Considering that Wii owners have been struggling to find solutions to battery-eating remotes since the console debuted, this could be bad news indeed. Luckily, Yip says the Nintendo rep assured him that these are only prototypes and, by the time the add-on is ready, they hope to have the issue fixed. But don't be surprised if they follow up with Wii MotionPlus 2 six months after the initial accessory is released.