Maintenance-Free BatterySpill-proof design means virtually no possibility of leaksAdvanced lead-calcium technology pumps up starting powerSulphation retardant dramatically reduces battery-killing plate sulphationLong lasting which means Yuasa's Maintenance Free batteries will last up to three times longer than conventional batteriesExceptional resistance to vibration makes Yuasa the most reliable battery on the market todayVRLA batteries hold voltage longer and need less charging in standby or storage mode