This case is constructed from durable, lightweight, high-impact plastic to provide years of reliable use. The rechargeable battery case features durable rear hinge and a secure thick snap lock with a separate piece of plastic latch to secure everything in place. The sturdy design allows the hinged box to open and close without wearing out over time. Hold 46 AA, or 24 AA & 36 AAA, or 64 AAA at a time.