Specifications: Capacity: 16000mAh (12.8V 4Ah) Start current: 450A Peak current: 600A Battery tester, Alternator tester USB output: 5V 2.4Amp Laptop power supply: 19V 3A LED working light & warning light Applicable temperature: -30 - +60˚C Cycle life: 2000 times Accessories: 6