Perhaps, like me, you once received a portable car starter as a gift from a parent or spouse. The product stayed in your trunk; you were happy to not use it but glad to know it was there. Now you can place similar technology in your 15- to 29-foot boat. Charles Industries has designed StartNow, an automatic starter switch and battery combiner for the average boater. The unit's microprocessor allows the main battery to drain without draining the reserve battery. When the unit detects main-battery voltage dropping below cranking ability, it engages and draws charging power from the second battery. StartNow then recharges automatically from an alternator or charger. StartNow is sealed in a 4 x 3 x 2?-inch waterproof case; mount it close to the batteries using the simple two-wire connection. Retail price is $128.34. Call 847-806-6300 or visit www.charlesindustries.com.