High quality. The protection board is designed for 13 series cell Li-ion batteries and is compatible with 3.7V ternary, manganese acid, and cobalt acid batteries. Features include overcharge protection, over-discharge protection, overcurrent protection, and short circuit protection. Suitable for use in electric vehicles, electric power assist vehicles, skateboards, inverters, and similar applications. Includes temperature control protection for safe and reliable operation. Specifications: - Applicable voltage: 48V - Applicable power: Less than 2500W - Maximum working current: 60A - Continuous maximum current: 40A - Overdischarge protection voltage: 2.6V - Overcharge protection voltage: 4.25V - Maximum charging current: 10A - High temperature discharge protection: 75C - Low temperature charge protection: -7C - Material: Metal - Color: Silver Package Contents: 1 x Battery Protection Board Note: Other items not included. Due to lighting effects and monitor settings, the actual color may vary slightly from the image. Measurement tolerance: +/- 1-3 cm.