The Sukhig 400Ah / 12.8V lithium battery is a deep-cycle LiFePOâ‚„ (lithium iron phosphate) battery designed for reliable off-grid or backup power use. With about 3.5 kWh usable capacity, it delivers steady current over long discharge periods, low self-discharge, and high cycle life (often 2000+ cycles), making it ideal for solar installations, inverter systems and critical loads. It features built-in protection for overcharge, overdischarge, short circuit, and temperature extremes.