The J2500 LiFePO4 automatic car jumper is a top-of-the-line device that features a PD 60W two-way Fast Charging capability delivering exceptional charging performance. With its lightning-fast charging capabilities the J2500 can fully recharge in just 1-1.5 hours ensuring that its always ready when you need it. Additionally the devices 3-minute charge feature allows for a quick jump-start providing reliable power in emergency situations. With its advanced safety features the J2500 best LiFePO4 jump starter delivers exceptional protection providing 10 types of built-in safeguards including spark-proof mistake-proof and reverse-polarity protection to alleviate any concerns about potential malfunctions such as short circuits or sparks.