Safety and Durability: This battery pack features overheat protection, overcharge protection, and short circuit protection; when any of these occur, it automatically shuts off to ensure your safety. It also features LED battery indicators that display the battery level in real-time, helping you better monitor power levels. The built-in BMS system prolongs the battery's service life.Great Compatibility: The 4Ah rechargeable battery is compatible with several AstroAI products, including model JY23P160-2301812, JY16P160-18, LS40791, and the AIRUN TC3. This battery pack provides great convenience, reliability, and output- whatever your power needs are. This is a great addition to the toolbox for families, trips, and the outdoors.Power Bank Function: This battery’s USB output function can be used to conveniently recharge portable 汽车用品 like tablets, portable gaming consoles, and phones- making it extremely useful in emergencies.【METAL INFLATABLE STRUCTURE】: It’s composed of metal cylinder and metal gear, it could continuously work for 20 minutes, the maximum air pressure could reach 160psi, meet the needs of 4 tires at a time, more efficient and faster to use.【FAST INFLATION&CHARGING】: Air/Electricity The 20V working voltage provided by the rechargeable battery can inflate fast, tires of size 195/65/R15 can be filled in just 4 minutes. The 2000mAh high-efficiency rechargeable battery can charge 4 tires of the same size at a time, and the exclusive charger allows the battery to go from 0 to full in just 1 hour.