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The GOOLOO GT4000S is a portable lithium jump starter rated at 4000A peak, which GOOLOO says is enough for 12.0L gas and 10.0L diesel engines. It adds 100W two-way USB-C fast charging, so it can top up laptops and phones as well as itself. The bundle pairs it with the DS200 OBD scanner, which reads and clears engine codes. It suits truck, SUV and RV owners who want one box for a dead battery and a check-engine light. Against smaller 2000A-class starters it is heavier and aimed at big engines rather than commuters, and it costs more than a plain jump pack because of the charger and scanner.
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Lowest price we've seen: $99.99 on Nov 15 at Amazon. Tracked across 2 stores since Nov 15.
The GOOLOO GT4000S is a portable jump starter for reviving dead car batteries. It delivers 4000A peak current and can start gas engines up to 12.0L and diesel engines up to 10.0L, including those in trucks, SUVs, RVs and heavy-duty equipment.
It also works as a power bank. A 100W USB-C port charges in both directions and can power laptops such as a MacBook. An 18W USB-A port charges phones and tablets, and a 15V/10A DC output powers larger devices. The unit recharges from empty to 100% in 1.2 hours and can be ready for another start in 5 minutes after recharging.
The jump starter has 10 safety protections, including reverse-polarity, over-charge, over-voltage, short-circuit, extreme-temperature, over-current, over-load and reverse-charge protection, plus spark-proof technology. Software monitors power flow and battery status in real time. A built-in LED light has three modes: spotlight, steady light and SOS strobe.
