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High-Performance Solar System Gel Deep Cycle Battery Options. Long Cycle Life: Designed life exceeds 15 years for extended durability. High Purity Alloy: Lead-tin alloy reduces self-discharge and extends service life. Efficient Discharge: High efficiency discharge with low self-discharge rate. Heat Sealing Technology: Superior tightness and stability compared to glue sealing. Valve Regulation Tech: Reduces internal resistance and material costs while improving life. Versatile Applications: Suitable for cars, buses, UPS, boats, and electric bicycles. Fast Lead Time: Peak and off-season delivery within 15 working days.