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Solar Lithium Battery Back up Battery 73V 87V Smart Litium Ion Battery for Mobility Applications Use. Premium Cell Quality: High-quality LiFePO4 cells ensure long cycle life and high safety. Flexible Heating Option: Heated version effectively solves low-temperature challenges and expands application scope. High-Current Load Capacity: Supports sustained high-current discharge for heavy-duty equipment demands. Multi-Layer Safety Protection: Comprehensive BMS electrical protection for worry-free operation.