Pilot Industries Ltd. Manufactures Low Maintenance Heat Sealed Battery. Pilot Industries Ltd. Is the manufacturer of battery plates, batteries, pvc battery separators, lead, lead alloys, lead oxide. Low Maintenance Heat Sealed Battery is used for pounding vibration due to rough roads, long cranking due to stubborn engine starting, heavy house power and auxiliary loads, long hours and days of trolling without recharge, and even super-heavy demands of consumer and application.