How to Charge a Jump Starter Pack (2026)

A dead battery on a cold morning turns a simple drive into a wait by the side of the road, and a flat jump starter is no help at all. Learning how to charge a jump starter before that morning comes keeps the pack ready: plug it in, charge it fully, and follow the maker’s top-up schedule.

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Below: the charging steps, charge times and top-up schedules.

#	Product	Shop Score	Buy
1	KRUPLH Portable Car Battery Jump Starter with Air	9.7/10	Buy on Amazon
2	GOOLOO GT4000S 12V 4000A Peak Jump Starter	9.7/10	Buy on Amazon
3	AUXITO Portable Jump Starter	9.7/10	Buy on Amazon
4	HALO BOLT AIR+ 1750A Jump Starter, AIR Compressor	9.6/10	Buy on Amazon

1

KRUPLH Portable Car Battery Jump Starter with Air

KRUPLH·9.7/10 Shop Score

i

The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 9000A jump starter with a 150 PSI air compressor, a 59.2Wh battery and a 2.5-inch HD display, rated to 9L gas and 8L diesel.

Check price on Amazon

Pros

• 9000A peak current, rated to 9L gas and 8L diesel
• 150 PSI air compressor with 45L/min airflow and 4 nozzles
• UL 2743 standard and a V-0 fire-resistant housing
• 24-month warranty, lifetime tech support, 1500+ recharge cycles

Cons

• Inflator needs a 10-minute rest after 10 minutes of use
• Retries limited to 3-5 times, after a wait of 30 seconds to 1 minute
• Needs a recharge every 2-3 months in storage
• Not for use or storage in high-temperature environments for prolonged periods

2

GOOLOO GT4000S 12V 4000A Peak Jump Starter

GOOLOO·9.7/10 Shop Score

i

The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 4000A jump starter with 100W two-way fast charging, a 20,000 mAh capacity and a 150W DC output, rated to 12L gas and 10L diesel.

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Pros

• 100W two-way fast charging: 0% to 100% in 1.2 hours
• 4000A peak current, rated to 12L gas and 10L diesel
• One full charge gives 60 jump starts
• 20,000 mAh capacity, 150W DC output, three USB ports

Cons

• 18-month warranty, shorter than the 24-month and 2-year terms here
• 15V/10A port only powers compatible 12V or 15V DC devices
• No air compressor in the pack
• 400-lumen flashlight has 3 modes and no floodlight

3

AUXITO Portable Jump Starter

AUXITO·9.7/10 Shop Score

i

The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 4000A jump starter with a 2000-lumen working light and a Type-C input, rated to 8L gas and 7L diesel.

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Pros

• 4000A peak current, rated to 8L gas and 7L diesel
• 2000-lumen working light, 4 modes, lit for 24 hours
• 180° rotatable metal stand, 2 hooks, magnetic mount
• 2-year manufacturer warranty with 10 safety protections

Cons

• No air compressor in the pack
• Needs a charge once every 3 months in storage
• Must stay over 50% before use
• Engine coverage tops out at 8L gas and 7L diesel

4

HALO BOLT AIR+ 1750A Jump Starter, AIR Compressor

HALO·9.6/10 Shop Score

i

The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 1750A jump starter with a 130 PSI air compressor and a 59.9Wh power bank, rated to 6L gas and 3L diesel.

Check price on Amazon

Pros

• 1750A peak current, 600 amps, for 12-volt cars, SUVs and trucks
• 130 PSI air compressor and a 59.9Wh power bank
• Bi-directional USB-C port for rapid recharging, plus USB-A
• Extra-large color display, 3.5x previous Bolt models, plus floodlight

Cons

• 90-day warranty, the shortest term here
• 1750A peak current, the lowest of the packs here
• Engine coverage tops out at 6L gas and 3L diesel
• Measures 9.62 x 11.5 x 6.8 inches, the largest body here

How to charge a jump starter

Charging a jump starter is a plug-in job, not a repair: connect the cable, wait for a full charge, and unplug the pack. The port differs by maker, so follow the steps below.

1. Charge the pack fully before first use. The KRUPLH and AUXITO makers call for a full charge before the first job.
2. Connect the charging cable to the pack and the other end to a wall outlet. The GOOLOO pack also charges from its 100W car charger.
3. Check the charge while it charges. The KRUPLH display shows the battery level, the GOOLOO screen shows the pack status, and the HALO display shows charging status and percentage level. The AUXITO pack has no display stated.
4. Unplug the pack when it shows a full charge. Store it out of prolonged high heat: the KRUPLH maker lists an operating temperature range of -4°F to 140°F.
5. Recharge the pack on the maker’s schedule while it sits unused. The KRUPLH pack needs a recharge every 2-3 months in storage, and the AUXITO pack needs a charge once every 3 months.
6. Keep the AUXITO pack over 50% before use. Charge it to 100% before the first job.

Once the clamps are on, the KRUPLH maker says to start the vehicle within 30 seconds. If the first try fails, wait 30 seconds to 1 minute before trying again, and try a maximum of 3-5 times in a row.

How long does charging take, and how often should you recharge it

The GOOLOO pack is the only one here with a stated charge time: 100W two-way fast charging takes it from 0% to 100% in 1.2 hours, and 5 minutes of charging is enough to start a car. A single full charge gives 60 jump starts, and the pack holds a charge for 24 months of standby. The KRUPLH pack lists a 24-month standby with 1500+ recharge cycles, so a pack that holds its charge still needs a top-up.

Jump starters at a glance

Match the pack to the engine: check what size jump starter you need before choosing.

Jump starters that cover the charging job

Each pack below jumps a dead battery, and each card notes how the pack takes a charge.

FAQ: garage tools

How long does it take to charge a jump starter?

It depends on the pack. The GOOLOO GT4000S takes 1.2 hours from 0% to 100% with 100W two-way fast charging, and 5 minutes of charging is enough to start a car.

How often should a jump starter be recharged in storage?

The KRUPLH pack needs a recharge every 2-3 months when it sits unused, and the AUXITO pack needs a charge once every 3 months. The GOOLOO pack holds a charge for 24 months of standby, and its maker says regular charging is not necessary.

Can a jump starter be charged in the car?

It depends on the pack. The GOOLOO pack includes a 100W car charger and charges through its Type-C port, and the HALO pack recharges through a bi-directional USB-C port. The KRUPLH and AUXITO packs state no car charging option.

Does a jump starter need charging before first use?

For the KRUPLH and AUXITO packs, yes. The makers say to fully charge the pack before first use, and the AUXITO maker adds that the pack should be over 50% before use.

How can you tell when a jump starter is fully charged?

Check the pack. The KRUPLH display shows the battery level, the GOOLOO screen shows the pack status, and the HALO display shows charging status and percentage level. The AUXITO pack has no display stated.

Related: power station vs jump starter, jump starter vs battery maintainer and jump starters for SUVs.