Compact battery bank. with 3 useful functions: starting aid for vehicles with 12 V electrical systems. normal battery bank for various smart devices. vacuum cleaner function. As a starting aid, the battery bank can output up to 400 A of starting power. which can start the car in seconds. Thanks to the protection systems (spark protection. Polarity protection. Short circuit protection. Overvoltage protection. Temperature protection), the starting aid is very safe. With a 2.5 Ah lithium battery, the battery bank has enough power. to download to your smartphone if necessary. computer or tablet. In addition, the battery bank can also be used as a vacuum cleaner. with a power greater than 4700 Pa. The included nozzles make it convenient to pick up dust from difficult places. The filters are washable and reusable. The product comes with jump leads. USB Type-C cable. vacuum cleaner nozzles and protective box. Technical information: Charging connector USB Type-CLithium battery size 3500 mAh. 37 WhCharging time 5 hoursStarting power 400 AMaximum power 1000 AUSB output 5 V. 2.1 Vacuum cleaner power 4700 PaDimensions 272 x Ø65 mmWeight 0.730 kg