Buying a car jump starter: how to choose the right one for your car

A flat 12V battery often strikes at the worst possible moment: in a dark car park, during a caravan holiday or on your way to work. A car jump starter can be a practical solution, without relying on another driver. But not every portable jump starter is right for every vehicle or situation.

Look out for these three common pitfalls:

• Confusing peak current with continuous starting power: a high amp rating may sound impressive, but it doesn’t tell you everything about whether the jump starter is right for your engine.
• Overlooking engine size and fuel type: a model suitable for a 6-litre petrol engine isn’t automatically suitable for a diesel engine of the same size.
• Forgetting about maintenance and storage: a jump starter left flat in your car for months may not have enough charge when you need it in an emergency.

Which specifications matter?

1. Check the voltage, fuel type and engine size

Most models in this category are designed for 12V lead-acid batteries. Check your vehicle’s manual to confirm. A car jump starter isn’t necessarily suitable for an electric car or a high-voltage system.

Next, check the stated compatibility:

• petrol and diesel engines have different starting requirements;
• diesel engines generally need more starting power;
• SUVs, vans, motorhomes and lorries may need more capacity than a compact city car;
• an engine size above the stated limit falls outside the product description.

Brands provide these figures themselves. For example, the GOOLOO GP2000 is claimed to support engines up to 8.0 litres petrol and 6.0 litres diesel. This is a manufacturer’s product specification, not a guarantee for every battery condition or vehicle model.

2. Look beyond the highest amp rating

Peak current, for example 1500A, 2000A or 4000A, is a snapshot. Also check:

• the stated starting current, if provided;
• the maximum engine size for petrol and diesel;
• whether it has a special boost or forced-start function;
• whether the jump leads are sturdy and long enough to reach the battery terminals;
• which safety features are built into the smart cable.

Useful safety features include reverse polarity, short-circuit, overheating, overload and spark protection. These features help reduce the risk of incorrect use, but they don’t replace careful connection according to the manual.

3. Decide which extra features you’ll actually use

A basic car battery booster is compact and often easy to store. A more advanced model may also work as:

• a jump starter with power bank for a phone, tablet or GPS;
• a jump starter with LED torch featuring steady, flashing or SOS modes;
• a jump starter with compressor for an underinflated tyre;
• a power bank with USB-C fast charging;
• a device with an LCD screen showing battery level, temperature or tyre pressure.

An air compressor is useful for motorists, motorhome owners and outdoor enthusiasts, but it makes the device heavier. Also check the maximum pressure in PSI, the air hose, the included valve adaptors and the automatic shut-off feature.

How to use an emergency car jump starter safely

Read the full manual before using the device for the first time and charge it fully. The general procedure is:

1. Switch off the car and put it in park or neutral.
2. Connect the red clamp to the positive (+) terminal.
3. Connect the black clamp to the negative terminal or a suitable unpainted metal earth point.
4. Check that the smart cable indicates it’s ready.
5. Crank the engine for no more than a few seconds at a time.
6. If the engine doesn’t start, wait between attempts.
7. Once the engine has started, remove the black clamp first, then the red one, following the product manual.

Don’t let the clamps touch each other. Only use a forced-start function when you’re certain the polarity and connections are correct. If the cables are damaged, there’s a leak, the battery is swollen or you’re unsure what’s causing an electrical problem, it’s safer to call for roadside assistance.

Recommended models for different needs

Suitable for: Budget-conscious beginners

GOOLOO GE1500 Jump Starter Power Bank

Why it suits this need: A compact option for drivers of a standard car, motorbike or small SUV who mainly want to carry a simple jump starter and power bank.

How this product helps avoid the pitfall

The product description states a peak current of 1500A, support for engines up to 6.0 litres petrol and 4.0 litres diesel, plus ten safety features. Check these details against your vehicle’s specifications.

Key benefits & features

Two USB ports, a 400-lumen lamp with three modes and a stated weight of around 0.878 kg, according to the product specifications.

Suitable for: Buyers looking for premium quality

GOOLOO GP2000 Car Jump Starter Power Bank

Why it suits this need: A good choice if you want a powerful 12V jump starter for a car, SUV, van, motorbike or recreational vehicle.

How this product helps avoid the pitfall

The smart cable is listed as having several safety features, and the casing is described as being designed for robust use. You’ll still need the right 12V battery.

Key benefits & features

2000A peak current, USB ports, a 400-lumen LED torch and stated support for engines up to 8.0 litres petrol and 6.0 litres diesel.

Suitable for: Specialist needs & frequent use

YaberAuto YA90 Starter Battery with Compressor

Why it suits this need: A practical combination for SUV and lorry drivers, campers and travellers who also want to manage tyre pressure and charge mobile devices on the go.

How this product helps avoid the pitfall

According to the product description, the LCD screen displays the set tyre pressure and the compressor switches off automatically when it reaches the set value. Don’t run the pump for long periods without a break.

Key benefits & features

A 160 PSI compressor, 65W two-way USB-C charging, a 3.3-inch LCD screen and a 600-lumen LED emergency light, according to the manufacturer.

Suitable for: SUV, motorhome and diesel drivers

TREKURE Beta06 5500A Car Jump Starter with air compressor

Why it suits this need: The combination of jump starter, compressor and power bank is well suited to larger vehicles, long journeys and outdoor use.

How this product helps avoid the pitfall

The manufacturer lists an LCD pressure display, automatic shut-off and safety features including short-circuit and reverse-polarity protection. Check whether the stated capacity for engines up to 10.0 litres petrol or 10.0 litres diesel applies to your vehicle.

Key benefits & features

5500A peak current, a 150 PSI air compressor, stated battery capacity of 23800mAh and three light modes.

Maintenance, costs and lifespan

A car jump starter needs little day-to-day maintenance, but it does need regular checks. Charge the device according to the manual and check its battery level before a long journey. Some manufacturers recommend topping it up every two to three months; follow the instructions for your chosen model.

Don’t store the jump starter in direct sunlight or in a very hot car for long periods. Lithium batteries may perform less well in cold and hot conditions. Also check the cables, clamps, USB ports and compressor accessories. The main running costs are usually the electricity used for charging and any replacement of the device or its internal battery after prolonged use.

Frequently asked questions about car jump starters

Can I use a jump starter for any car?

No. Check whether your vehicle has a 12V lead-acid battery and compare its fuel type and engine size with the product specifications. A car jump starter isn’t automatically suitable for electric vehicles.

How long does a jump starter take to charge?

It varies by model and charger. A device with USB-C fast charging may charge more quickly than a basic model. Check the stated input, for example 18W, 65W or 100W, and only use suitable cables and adaptors.

How often should I charge a portable jump starter?

Check the device regularly and charge it when the level is low. If you won’t be using it for a while, manufacturers often recommend checking or charging it every two to three months. It’s a good idea to recharge it after using it to jump-start a vehicle.