Mophie, maker of mobile battery cases, has acquired Submodal LLC for an undisclosed amount.

Submodal, headquartered in Laguna Beach, California, is a web design and software development studio. The group specializes in web strategy, application development, multimedia and interactive design, site enhancement, user experience and e-commerce platform development. The company works with Skullcandy, NBC Universal and other clients.

Orange County, California-based Mophie says the deal helps it add digital development expertise.  The company makes a battery case for mobile telephones that recharges phones so the battery lasts longer. The company has $1 million in venture funding from FreshTracks Capital and Village Ventures.

In another recent business software deal, in May, Capital A Partners invested startup PerformYard.