Schumacher Electric Battery-Less Ultracapacitor 450A Car Battery Jump Starter, DSR Professional Grade, Built-in Voltmeter, For 12V Automotive and Marine Batteries, DSR108

The Schumacher Electric DSR ProSeries DSR108 Battery-less Ultracapacitor Jump Starter delivers powerful, dependable starts without the limitations of traditional lead-acid or lithium batteries. Built with ultracapacitor technology, this 450-amp jump starter charges in seconds and performs reliably in extreme temperatures from minus 40 degrees Fahrenheit to 150 degrees Fahrenheit. Unlike lithium or AGM units, the DSR108 can be fully discharged and recharged from a weak battery in just 100 seconds. Its long lifespan—up to 10,000 cycles or 10 years—makes it a durable choice for professionals and everyday drivers alike. A built-in voltmeter provides instant feedback on battery health, while multiple connection options and safety features like reverse polarity and short circuit protection ensure ease of use and peace of mind.