E-FAST 12v power bank with battery rescue starter car rescue starting power supply

Use tips! (All charging treasures can refer to)  The product has just been received. First turn on the flashlight to discharge, then charge the product for more than 4 hours, and then start the car, because the product contains virtual electricity This operation can prolong the service life of the product!  Tips for daily maintenance: 1: The battery has a shelf life. Whether you use it or not, it is recommended to charge and discharge the battery once every 2-3 months. 2 When it is not used for a long time! Please keep 3 grids of power supply or more...