XS Power audio accessories put the right charge in your music without causing a short. Their voltage control module (VCM) harnesses plug into your alternator, allowing a battery to charge at the appropriate voltage. Whether you have a 12V, 14V or 16V auxiliary battery, it will get the power your audio system needs. We carry VCM harnesses for both factory and aftermarket alternators that simply plug and charge. Contact us to learn about more options for your XS Power battery setup.