 FAKE: On Michael and Walts flashback, Walt is playing what should  be a Game Boy Advance SP. The green light on the GBA SP says that  the battery is full, yet when Walt sneaks up behind Michael, he says  he needs new batteries. Not only is the battery fine, but the GBA SP  has a rechargeable battery, so Walt cant really "need batteries"  anyway. When the battery runs dry it must be recharged, not  replaced.