This unit includes 8 protection features, including over-current protection, overload protection, over-voltage protection, and overcharge protection, making it extremely safe to use. The GOOLOO Jump Starter includes a lithium polymer battery built for operating and storage temperatures of -20°C to 60°C (-4°F to 140°F). If the ambient temperature is above 60°C (140°F), the internal cell construction of the lithium polymer battery may be damaged, causing it to swell and become unsafe. Do not store the device in a vehicle parked in hot weather for long periods of time. x 15W in/out Type C port (9V/ 2A, 5V/ 2.4A, 12V/1.5A) 1 x 5V, 2.1A USB output 1 x USB QC 3.0 output With a massive 26800 mAh electric capacity, it ranks as a reliable power bank for mobile devices. Its powerful current influx makes it useful for jumping batteries of high-capacity engines.

On the other side, Gooloo GT4000 shows design modifications like LCD monitor, and 100W charging port, making it more user-friendly than its competitor. When it comes to compatibility with vehicle batteries, GP4000 takes the lead as it supported high capacity engines than its competitor. It can jump-start diesel engines with a capacity of up to 10 liters and all gas engines. Both the Gooloo GT4000 and the Gooloo GP4000 are powerful jumpstarters, that are multi-functional and offer great alternative to traditional car battery jump starters that you can not carry everywhere. Both of these Gooloo starters are equipped with high-power cells that jump-start lifeless batteries and supply power to DC appliances as well. QC 3.0 ports enable faster charging of devices and 15V DC outputs provide effective charging through cigarette adaptor.

Top 9 Product Ratings

This unit is perfect to jump start a dead car in ice and snow when the battery is undercharging, the car stalls while driving, or in emergencies, for medical rescue, or on road trips. Both devices are useful for powering up 12V batteries. GP4000 supports batteries of heavier gas engines.

The jumper cable features a smart Over-Start Protection function. If you start the vehicle more than 4 times in 2 minutes, the jumper cable will turn on Over-Start Protection: The green and red light will start to blink and the battery clamps will have no output. When you disconnect the jumper cable plug from the jumper starter, the smart Over-Start Protection will reset.Gooloo GP4000 presents a cleaner layout, two color schemes, and compact size. It carries a Lithium polymer battery that can discharge current up to 4000 Amperes. Moreover, it gives low-battery, low-current, low-temperature, ready-to-start, and reverse polarity indications. The boost option is another advantage it has, allowing it to supply a huge amount of charge to an extremely low voltage battery. However, it does not come with a hard EVA storage case instead a sac-style storage pouch is included that does not provide much safety to the equipment. Design Features