A battery positioning device for fixing a battery includes a base defining a receiving groove to receive the battery, a first elastic member fixed in the receiving groove to resist a positive electrode of the battery. The first elastic member includes a main body, a fixing portion fixed to the base, and an operating portion. The main body includes a hook thereon. The hook includes a resisting portion to resist the positive electrode of the battery and a hooking portion hooking the positive electrode. The fixing portion and the operating portion extend from opposite ends of the main body, respectively. The operating portion is capable of moving away from the battery, thus deforming the first elastic member to elevate the battery by the hooking portion.