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. AstroAI 20V max 2.0AH Lithium battery is designed to be compatible with 20 Volt Max cordless tools and outdoor equipment. This battery is easy to install remove and is always ready to go due to the battery ability to hold a charge for an extended amount of time.