What a Halo charger does and who makes it

A Halo car battery charger is a portable jump starter and charger made by Halo, a company owned by Clore Automotive. Unlike a traditional charger that plugs into a wall outlet and takes hours, a Halo is a battery pack you keep in your car or garage. When your car battery dies, you connect the Halo to your battery terminals, and it sends power directly to start your engine — usually in seconds or minutes, not hours.

Halo makes several models. The most common is the Halo Bolt, which is roughly the size of a thick paperback book and weighs a few pounds. Some models also charge phones and tablets through USB ports, and some include an air compressor to inflate tires. The core function is the same across all of them: store electrical charge and release it into a dead battery when you need it.

The main difference between a Halo and a traditional wall-outlet charger is speed and portability. A wall charger stays at home and takes 4 to 24 hours depending on how dead your battery is. A Halo sits in your trunk and works anywhere — in a parking lot, on the highway, at 2 a.m. — as long as the Halo itself is charged.

Key Takeaways

  • A Halo charger is a portable battery pack that starts your car without needing a wall outlet or another vehicle.
  • You charge the Halo at home using a standard outlet, then keep it in your car for emergencies.
  • Starting your car with a Halo takes a few minutes and requires connecting two clamps to your battery terminals.
  • A Halo will work multiple times before it needs recharging, depending on your battery size and how dead it is.
  • Halo chargers cost between $100 and $300 depending on the model and features like USB charging or an air compressor.

How to charge a Halo before you need it

A Halo charger arrives partially charged but not fully ready to use. Before you put it in your car, charge it completely using the cable and wall adapter that come in the box. Plug the adapter into a standard household outlet and connect the cable to the Halo's charging port. Most models take 4 to 8 hours to charge fully, depending on the model and the outlet's power.

Once it is fully charged, the Halo will hold that charge for weeks or months if you do not use it. However, like any battery, it loses charge slowly over time. If you have not used your Halo in three to six months, charge it again before relying on it in an emergency. Many owners keep their Halo plugged in during winter months when car batteries are most likely to fail.

You can tell when a Halo is fully charged by looking at the LED lights on the device. Most models show a row of lights that fill up as the charger charges — when all lights are on, it is ready. The manual that comes with your Halo will show exactly which light pattern means "fully charged" for your specific model.

Steps to jump-start your car with a Halo

When your car will not start, open your hood and locate your battery. It is a rectangular box with two thick cables attached — one red (positive) and one black (negative). Turn off your car completely and make sure the Halo is also off.

Take the red clamp from the Halo and attach it to the positive terminal on your battery — this is the terminal with the red cable. Take the black clamp and attach it to the negative terminal — the one with the black cable. Do not reverse these or touch both clamps to the same terminal.

Once both clamps are connected, turn on the Halo using the power button. Wait 10 to 30 seconds for the Halo to send power to your battery. Then try to start your car normally. If it does not start on the first try, wait another 30 seconds and try again. Most cars start within two or three attempts.

Once your car starts, let it run for at least 20 minutes. This gives your alternator time to recharge your battery. Then turn off the Halo and remove the clamps — black clamp first, then red clamp. Close your hood and drive normally. If your battery dies again within a few days, the battery itself may need replacement rather than just a charge.

How many times a Halo can start your car

A single Halo charge can start most cars between 10 and 20 times, depending on the Halo model, your car's engine size, and how completely dead your battery is. A small sedan with a four-cylinder engine might start 15 to 20 times per Halo charge. A large truck with a V8 engine might start only 8 to 12 times. A completely dead battery takes more power than a weak one, so the number of starts varies.

After you use your Halo, you do not have to recharge it when ready unless you used it multiple times. If you used it once to start your car, you can use it several more times before the Halo itself runs out of power. However, recharge it as soon as you get home so it is ready for the next emergency.

Some Halo models show remaining charge with LED lights. A row of lights will dim or disappear as the Halo loses power, so you can see how many starts you have left. Check your manual to learn what the light pattern means for your specific model.

Halo chargers versus traditional wall chargers and jump boxes

A traditional wall charger plugs into an outlet and charges your car battery while it sits in your driveway. It takes much longer — usually 4 to 24 hours depending on how dead the battery is — but it is cheaper, often $30 to $80. You cannot use it in an emergency away from home.

A jump box (also called a jump starter or portable charger) is similar to a Halo but is a broader category. Halo is one brand; other brands include Stanley, NOCO, and Schumacher. All portable jump boxes work the same way: you charge them at home, keep them in your car, and use them to start a dead battery. They vary in size, price, and extra features like USB charging or air compressors. A Halo is straightforward one option within that category.

Jumper cables are the oldest method. You connect cables from another car's battery to yours, and that car's alternator charges your battery. This is free if you have cables and another car nearby, but it requires two people and another working vehicle. It also takes 5 to 10 minutes of the other car running before your battery has enough charge to start.

When a Halo will not work or when you need something else

A Halo charger works for a dead battery, but not for every car problem. If your battery is completely dead but your car still will not start after using the Halo, the problem is likely not the battery — it could be a bad alternator, a faulty starter motor, or a fuel system issue. In that case, you need a mechanic or a tow truck, not another charge.

A Halo also will not work if your battery terminals are corroded or loose. If the clamps cannot make a solid connection to the terminals, the Halo cannot send power through. Clean the terminals with a wire brush or baking soda and water before trying again. If the terminals are damaged, you may need a mechanic to replace them.

If your car battery dies repeatedly — more than once every few months — the battery itself is likely failing and needs replacement. A Halo will keep starting your car temporarily, but it will not fix the underlying problem. A battery typically lasts 3 to 5 years. If yours is older, replacement is usually cheaper than repeated emergency charges.

Cost and where to buy a Halo charger

Halo chargers range from about $100 to $300 depending on the model. The basic Halo Bolt, which starts cars and charges phones, costs around $100 to $150. Models with larger capacity, an air compressor, or a built-in flashlight cost $200 to $300. You can buy them at auto parts stores like AutoZone and O'Reilly, online retailers like Amazon, and big-box stores like Walmart and Costco.

Prices vary by retailer and by season. They are often cheaper during spring and summer and more expensive in fall and winter when demand rises. Some retailers offer sales around holidays or back-to-school season. If you are not in a rush, waiting for a sale can save $20 to $50.

Most Halo chargers come with a warranty of one to three years. Check the warranty details before you buy, especially if you plan to use it frequently. A longer warranty costs more upfront but protects you if the charger fails.

Frequently Asked Questions

Can I leave a Halo charger in my car all year without it going bad?

Yes, but you should recharge it every three to six months, especially in winter. Car batteries fail most often in cold weather, so a Halo left uncharged in your trunk when you need it most is useless. Set a phone reminder to charge it twice a year — once before winter and once before summer.

What if my car battery is too dead for a Halo to work?

A Halo can start a car with a completely dead battery. However, if your car still will not start after the Halo sends power, the problem is not the battery. Call a tow truck or a mechanic. A Halo cannot fix a bad starter motor, alternator, or fuel pump.

Do I need a special Halo model for a truck or large vehicle?

Larger vehicles need more power to start, so a basic Halo may not work reliably. Check the Halo's peak amperage rating — this number tells you how much power it can deliver. For trucks and SUVs, look for a model rated 1,000 amps or higher. For sedans and small cars, 400 to 600 amps is usually enough.

Can I use a Halo to charge my battery while I drive, or only to start the car?

A Halo is designed to start a dead battery, not to charge it while you drive. Once your car starts, your alternator takes over and charges the battery. Disconnect the Halo clamps when ready after your car starts. Leaving it connected while you drive can damage both the Halo and your car's electrical system.

What should I do if the Halo clamps will not connect to my battery terminals?

Battery terminals often corrode, especially in humid or salty climates. Clean the terminals with a wire brush or a paste of baking soda and water. If the terminals are cracked or severely damaged, you may need a mechanic to replace them. Do not force the clamps — a poor connection means the Halo cannot send power to your battery.