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High-performance Su-mak Solar 220Ah C5 12V Tall Tubular Battery designed for solar system back-ups, home inverters, and heavy-duty deep discharge applications. Built with high-pressure die-casted positive plates and Sb/Se low-maintenance alloy, this battery delivers extended cycle life (over 1,500 cycles at 80% DOD), ultra-fast charging capability, and greater than 95% ampere-hour efficiency.