Balmar ARS Multi-Stage Regulator w/Harness - 12V [ARS-5-H]ARS Multi Stage Regulator w Harness 12V High output alternators are an important part of your system for battery care, but they are definitely not the only part. Without proper voltage regulation, battery charging can be a slow process, or even worse, an ideal recipe for early battery failure. This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.