An adjustable storage rack configured to support a variety of devices, including valve regulated or flooded lead acid batteries. In one embodiment, the adjustable storage rack includes a series of stanchions, a series of side rails extending between at least two of the stanchions, and a series of end rails extending between two of the side rails. The adjustable storage rack may also include a stanchion adjustment assembly slidably coupling one of the stanchions to one of the side rails. The adjustable storage rack may also include first and second end rail adjustment assemblies. The first end rail adjustment assembly slidably couples a first end portion of one of the end rails to one of the side rails, and the second end rail adjustment assembly slidably couples a second end portion of the end rail to a second one of the side rails.