How Do You Charge a Gooloo Jump Starter?

On this page (10 sections)

1. How do you charge a Gooloo jump starter step by step?
2. Why does the 100W charger matter so much?
3. Can you charge a Gooloo jump starter from a wall outlet?
4. How long does a full charge last in storage?
5. Which Gooloo model fits how you'll charge it?
6. What should you know before the first charge?
7. How do you charge it safely?
8. How often should you top it up?
9. What if your Gooloo won't charge?
10. The bottom line on charging a Gooloo jump starter

Here's how you charge a Gooloo jump starter: plug the included 100W car charger into the unit's USB-C port, let the screen climb to 100%, and unplug when it's full. Charge it fully before the first use, then top it up on a schedule so it's ready when a battery dies.

The 100W fast-charge setup fills these models in about 1.2 to 1.4 hours from empty.

How do you charge a Gooloo jump starter step by step?

Use the SC 100W car charger in the box, connect it to the jump starter's USB-C port, and power it from your car's 12V socket. That's the whole routine.

Everything else is watching the display and unplugging when the battery reads full.

Here's the order that works:

1. Plug the cigarette-lighter end of the 100W charger into your car's 12V socket with the engine running or the ignition on.
2. Connect the USB-C end to the jump starter's input port.
3. Watch the 3.2-inch screen as the charge level rises.
4. Unplug once it reads 100%, then store the unit and cables in the bag.

Gooloo includes the 100W car charger, a USB to Type-C cable, a Type-C to Type-C cable and a cigarette lighter adapter with these models. You don't need to buy a separate charger to get the fast rate.

Check the port labels on your unit before you plug in, since the jump starter has both input and output USB-C connections.

Why does the 100W charger matter so much?

The charger sets the speed. A 100W charger takes a Gooloo GT4000S or GT4000 Arctic from 0% to 100% in about 1.2 hours.

The GT6000 takes about 1.4 hours.

A standard 5W phone charger would take many times longer.

Gooloo says 5 minutes of charging on the GT4000S, or 7 minutes on the GT6000, is enough to start a car. That's the useful part for anyone who forgot to charge and needs a jump right now.

Plug it in while you're driving to the store and it's ready by the time you're back.

The same USB-C port doubles as an output on these units. Gooloo says you can charge a MacBook or other laptop through it at up to 100W, as fast as the laptop's own adapter.

So the charger that fills the jump box also keeps your devices going on a road trip.

Can you charge a Gooloo jump starter from a wall outlet?

Not with the included charger, which is a 12V car plug. For a household outlet, Gooloo says you can use your own fast charger through the Type-C port.

You need a USB-C power adapter that supports the same fast-charging standard, plus a USB-C to USB-C cable, which comes in the box.

This is handy if you keep the jump starter at home and don't want to run out to the car to top it up. Bring the unit inside, plug it into a 100W wall charger, and it fills in the same hour-plus.

The GT4000S, GT6000 and GT4000 Arctic all offer the same 100W two-way charging feature. Don't expect the same speed from a basic phone brick, though it still works.

How long does a full charge last in storage?

Gooloo rates the GT4000S and GT6000 for 24 months of standby time when fully charged. The GT4000 Arctic also lists 24 months, with a note to recharge every six months.

In plain terms, a full jump box can sit in your trunk for months and still have power for an emergency.

That doesn't mean you can ignore it forever. Gooloo says to recharge the GT4000S at least once every 3 months during long-term storage.

A calendar reminder at the start of each season keeps the habit simple.

Temperature matters here. Gooloo gives an operating and storage range of -4°F to 140°F for the GT4000S, with charging allowed between 14°F and 113°F.

Avoid leaving the unit in prolonged direct sun or a hot trunk in summer. Our guide to what a jump starter is explains why lithium packs behave this way.

Which Gooloo model fits how you'll charge it?

The three models share the same 100W charging core, so the choice comes down to starting power and cold-weather use. Here's where each one earns its place.

Best overall: Gooloo GT4000S

The GT4000S is the pick for most drivers. It delivers 4000A peak and Gooloo rates it for gasoline engines up to 12.0L and diesel up to 10.0L.

A full charge covers 60 jump starts according to Gooloo, which is plenty for a family car or a work truck.

It also works as a power bank: three USB ports, a 400-lumen flashlight with SOS, spotlight and strobe modes, and a 15V/10A DC output for tire inflators and inverters. For a full breakdown, see our Gooloo GT4000S review.

Best for big diesel engines: Gooloo GT6000

The GT6000 is the one to choose when you need the most cranking power. Its 6000A peak is rated for all gas engines and diesel up to 12.0L.

Gooloo gives it a 27,000 mAh battery, the largest of the three, and a 1.4-hour 100W charge.

It carries the same 24-month standby figure and the same three USB ports plus flashlight and DC output. The trade-off is a slightly longer charge time than the GT4000S.

If your garage holds a diesel pickup or a tractor, this is the one.

Best for cold winters: Gooloo GT4000 Arctic

The GT4000 Arctic adds pre-heating technology that Gooloo rates for starts down to -40°F. That's the feature to pay for if you park outside in a northern winter.

It still delivers 4000A peak for gas up to 12L and diesel up to 10L.

Gooloo backs it with an 18-month warranty. Our Gooloo jump starter roundup compares all three side by side if you're still deciding.

What should you know before the first charge?

Charge the unit to 100% before you rely on it. Gooloo's guidance for the GT4000S is to fully charge before first use, and the same habit makes sense for any new lithium jump box.

A unit that sat on a shelf may arrive partly drained.

Use the supplied cables and the 100W car charger for the first fill. The screen shows when the battery is ready, so you don't have to guess.

Plan the first charge for a day when you'll be driving for an hour or more anyway. Then press the power button and confirm the display shows a healthy charge before you put the unit in the trunk.

A jump starter you haven't checked is a jump starter you can't count on.

How do you charge it safely?

Charge in a ventilated spot within the rated temperature range, and unplug at full. These packs carry 10 built-in protections including overcharge and short-circuit protection, Gooloo says, but basic habits still matter.

• Charge between 14°F and 113°F on the GT4000S; don't charge a frozen pack.
• Keep the unit and charger away from water and damp floors.
• Don't leave it charging in a hot car or in direct sun.
• Unplug the charger when the screen reads 100%.
• Store the unit in its bag in a cool, dry place.

If the charge level won't move or the screen stays dark, stop and check the cable and socket first. Our guide to a jump starter that won't charge walks through the usual causes in order.

Don't open the case or poke at the battery yourself.

How often should you top it up?

Recharge on a schedule, not when you remember. Gooloo says the GT4000S needs a recharge at least once every 3 months during long-term storage.

The GT4000 Arctic's guidance is every six months.

The GT6000's 24-month standby time assumes a full charge to start with.

A simple plan: top up at the start of each season, or set a reminder for every 3 months. A 5-minute charge before a winter road trip adds a safety margin.

If the pack lives in a hot climate, check it more often and keep it out of the sun. Charge time is short enough that this isn't a chore.

What if your Gooloo won't charge?

Check the cable, the 12V socket and the temperature first. A loose plug or a cold pack stops the charge more often than a failed battery.

Try the Type-C to Type-C cable instead of the USB to Type-C one to rule out the cable.

Then look at the screen. A display that lights up but never rises points to the charger or socket; a dead screen points to the pack itself.

Our jump starter troubleshooting guide covers the checks in order. If the unit is still under warranty, contact Gooloo before taking anything apart.

The GT4000S and GT6000 list 24-month standby and protection systems; the Arctic carries an 18-month warranty. Keep your receipt.

The bottom line on charging a Gooloo jump starter

To charge a Gooloo jump starter, plug the included 100W car charger into its USB-C port, watch the screen to 100%, and unplug. A GT4000S or GT4000 Arctic fills in about 1.2 hours; the GT6000 takes about 1.4.

Then top it up every few months so it's always ready.

Pick the GT4000S for most drivers, the GT6000 for big diesel engines, and the GT4000 Arctic if you park outside in hard winters. Any of the three charges the same way.

Compare them all in our Gooloo jump starter guide before you buy.

Frequently asked questions

How long does it take to charge a Gooloo jump starter?

The GT4000S and GT4000 Arctic go from 0% to 100% in about 1.2 hours with the included 100W car charger. The GT6000 takes about 1.4 hours.

A partial charge works too, since Gooloo says 5 to 7 minutes is enough for an emergency jump start.

How often should you charge a Gooloo jump starter?

Gooloo says to recharge the GT4000S at least once every 3 months during long-term storage, and to charge it fully before first use. The GT4000 Arctic says recharge every six months.

The GT6000 has a 24-month standby time when fully charged, so a regular top-up keeps it ready.

How do you know when a Gooloo jump starter is fully charged?

Watch the 3.2-inch display. It shows the charge status and readiness, so the percentage or indicator climbs as the battery fills.

Unplug the charger once it reads full and store the unit within the recommended temperature range.

Can you leave a Gooloo jump starter plugged in overnight?

Gooloo lists overcharge protection among the built-in safeguards on these models. Even so, the simplest habit is to unplug once the screen reads 100% and store the unit in a cool, dry spot away from direct sun.

Why is my Gooloo jump starter not charging?

Start with the cable and the 12V socket, then try a different outlet or charger. If the screen stays dark or the charge level won't move, work through the checks in our jump starter troubleshooting guide before assuming the battery is dead.