Applicable for AstroAI Products: AstroAI electrical products, handheld air compressor with Li-ion battery, and multifunctional air pump. Not Include Battery Charger. Large Capacity+ Fast Charging: 2AH of the Li-ion battery needs one hour to be fully charged. Overheat Protection + Overcharge Protection: the li-ion battery pack will auto shut off when overheating or fully charged. These precautions provide safer using experiences for customers. LED Indicators: It can display the battery level. Four Hundred Cycles of Charge and Discharge: The li-ion battery provides a long service life, durable and enduring.