12.8V 200Ah lithium battery is a deep-cycle power storage unit likely using LiFePO4 (Lithium Iron Phosphate) chemistry.
Voltage: 12.8V nominal (often used in 12V systems)
Capacity: 200Ah / 2.56kWh energy storage
Use Case: Solar, RV, marine, or backup power
Features: High energy density, low self-discharge, and longer lifespan vs lead-acid