How Often Should You Charge a NOCO Jump Starter?

The short answer is every 3 to 6 months. A NOCO jump starter holds its charge for up to a year. But charging it at least every three months keeps the lithium-ion battery healthy. This makes sure it works when you really need it [citation:6].

Here’s a situation you don’t want. It’s freezing cold. Your car battery is dead. You grab your NOCO Boost. And nothing happens. The jump starter is dead too.

I’m Alex Rahman. I have tested jump starters in real-world conditions for over five years. A dead jump starter is useless. But the good news is that avoiding this is very easy.

Let me show you exactly how to care for your NOCO device. You will learn the simple rules for charging, storing, and keeping it ready for years.

Why Your NOCO Jump Starter Needs Regular Charging

Your NOCO device uses a lithium-ion battery. This is the same technology found in smartphones and laptops. These batteries are powerful. But they have one weakness.

They lose charge slowly over time. Even when you turn the device off. Even when you never use it.

This natural process is called “self-discharge.” It happens because of tiny chemical reactions inside the battery. You cannot stop it completely. But you can manage it [citation:4].

Most NOCO models lose about 3 to 5 percent of their charge each month. That might not sound like much. But do the math. After six months, your jump starter could be down to 70 percent or less [citation:6].

The battery management system inside also uses a tiny amount of power. It monitors the battery’s health constantly. This keeps you safe. But it also slowly drains the charge [citation:6].

The bottom line is this. A NOCO jump starter is not a “set it and forget it” tool. It needs your attention a few times per year.

How Long Can a NOCO Jump Starter Hold Its Charge?

This depends on the specific model. NOCO builds different jump starters for different needs. But all modern NOCO Boost and Genius series use high-density lithium-ion cells.

The official specification is impressive. A NOCO jump starter can hold its charge for up to one year [citation:9]. This is true for popular models like the GB40, GB70, and GB150.

Real-world tests show even better results. One professional auto technician reported using his NOCO GB70 for months without charging. He jumped over 30 cars in one week. The battery meter barely moved [citation:1].

Another user said their NOCO stayed charged for almost two years without plugging it in [citation:1]. But here is the catch. Keeping a lithium battery at full charge for that long is not good for it.

Here is a quick breakdown by model:

Model	Peak Amps	Charge Hold Time	Best For
NOCO Boost GB40	1000A	Up to 1 year	Cars, small SUVs, motorcycles
NOCO Boost GB70	2000A	Over 1 year [citation:5]	Trucks, V8 engines, boats
NOCO Boost GB150	3000A	Up to 1 year	Diesel trucks, RVs, heavy equipment

Notice a pattern? All models hold charge for a long time. But none of them last forever without help.

The Best Charging Schedule for Your NOCO Device

You need a simple system. A routine that is easy to remember. Here is the expert-recommended schedule.

This schedule works for all NOCO Boost models. It works for the GB20, GB40, GB50, GB70, GB150, and the newer GBX series.

What If You Use Your NOCO Jump Starter Every Week?

Frequent use changes the rules. If you are a mechanic, tow truck driver, or off-road enthusiast, you will use your jump starter often. This is actually good for the battery [citation:6].

Lithium batteries prefer shallow discharges. Using 20 to 30 percent of the charge and then recharging is ideal. Do not wait until the red battery warning light comes on. That light activates at around 20 percent remaining charge. Charge it before that point.

For professional use, I recommend charging your NOCO every weekend. Make it a Friday habit. This keeps the battery in its optimal range between 40 and 80 percent.

What If You Store Your NOCO for a Season?

Winter storage is common for classic cars and boats. You put the vehicle away for months. You store the jump starter too.

The rule is simple. Never store a fully charged or fully dead lithium battery. Both extremes cause damage over time [citation:4].

Charge your NOCO to about 60 percent before long-term storage. Then check it every three months. Top it up to return it to 60 percent if needed. This “storage charge” puts the least stress on the lithium cells [citation:6].

How to Check the Charge Level on Your NOCO

You do not need a special tool. Your NOCO jump starter has built-in indicators. They are easy to read.

Look for the small LED lights on the side or top of the unit. Press the “Power” or “Display” button once. The lights will turn on.

Here is what each light means:

• 1 blinking light: Below 25 percent. Charge immediately.
• 1 solid light: 25 percent charged. Very low.
• 2 solid lights: 50 percent charged. Acceptable for storage but low for emergencies.
• 3 solid lights: 75 percent charged. This is a good range for storage.
• 4 solid lights (green 100%): Fully charged. Great for immediate use but not ideal for long-term storage [citation:3].

Some newer models like the GBX series have digital displays. These show the exact percentage. Use the NOCO app on your phone to monitor these models remotely [citation:4].

How Long Does It Take to Charge a NOCO Jump Starter?

Charging time varies. It depends on two things: your NOCO model and the power source you use.

The fastest way to charge is with a 12V fast charger. For the GB70, this takes about 2 to 3 hours [citation:2]. The newest GBX models support USB-C Power Delivery. They can fully charge in just 2.7 hours [citation:4].

Charging with a standard 2.1A USB port takes longer. Expect 6 to 8 hours for most models [citation:3]. Charging with an old 0.5A computer USB port is very slow. That could take over 24 hours [citation:2].

Here is a quick charging time guide:

• NOCO GB40 (1000A): 3 hours with 2A charger, 6 hours with 1A charger [citation:3].
• NOCO GB70 (2000A): 2-3 hours with 12V fast charger, 7 hours with 2A USB charger [citation:2].
• NOCO GB150 (3000A): 5-7 hours depending on power source.
• NOCO GBX155 (4250A): 2.7 hours with USB-C PD (45W or higher) [citation:4].

Common NOCO Battery Mistakes to Avoid

I have seen many people ruin good jump starters. They make simple mistakes. Here are the most common ones to avoid.

Mistake 1: Leaving it fully discharged for months. This is the fastest way to kill a lithium battery. If the voltage drops too low, the battery management system locks the battery out for safety. Sometimes it cannot be revived [citation:4].

Mistake 2: Storing it in a vehicle year-round. Your car gets very hot in summer. Your trunk freezes in winter. Temperature extremes are the enemy of lithium batteries. Store your NOCO inside your home for the best lifespan.

Mistake 3: Using the jump starter to charge other devices constantly. The USB port is for emergencies. It is not a primary phone charger. Draining your NOCO to power an iPad reduces its ability to jump start your car [citation:1].

Mistake 4: Ignoring the monthly check. A dead jump starter is just a heavy paperweight. Five minutes of checking per month is a small price for peace of mind.

How Many Jump Starts Can You Get Per Charge?

This is a common question. The answer depends on the engine size and battery condition.

NOCO’s official numbers are impressive. The GB70 can start a typical V8 truck up to 40 times on a single charge [citation:5]. The larger GB150 can start vehicles up to 80 times [citation:7].

Real-world results match these claims. A professional mechanic reported jumping 30 cars in one week. He still had 25 percent battery left [citation:1]. Another user jumped multiple V8 engines and a diesel truck. The charge meter barely moved [citation:1].

But there is a catch. Extremely dead batteries take more power. Vehicles that have sat for months need more cranking. Very cold weather reduces battery performance. In these real-world conditions, you might get 10 to 15 jumps instead of 40.

The good news is that you will almost never need that many jumps. Most people use a jump starter once or twice a year. One full charge typically lasts for years of normal use [citation:1].

Does the NOCO Jump Starter Charge Itself?

No. A jump starter cannot charge itself. That would violate the laws of physics.

Your NOCO has a lithium battery inside. It also has jumper cables to send power out. But it cannot generate its own electricity. You must plug it into a USB port or 12V car charger to recharge it [citation:3].

Some older products had built-in alternator charging. Modern NOCO jump starters do not have this feature. Do not try to “jump” your jump starter with itself. That will not work. It could damage the internal electronics.

When Should You Replace Your NOCO Jump Starter?

All batteries wear out. Even with perfect care, your NOCO will eventually lose capacity.

NOCO rates their lithium batteries for over 1000 charge cycles [citation:5]. A “cycle” means using 100 percent of the battery’s capacity, not necessarily all at once. If you use 20 percent per week and recharge, five weeks equals one cycle.

At one full cycle per month, a NOCO battery could last over 80 years. That is theoretical. Real-world factors like heat and age will reduce this.

Most users get 5 to 7 years of reliable service from a NOCO jump starter [citation:4]. After that, the battery might still work. But it will not hold as much charge. It might not start large engines reliably.

Signs it is time to replace your NOCO:

• It no longer holds a charge for more than a month.
• The LED indicators show full charge, but it fails to start your car.
• The case is swollen or cracked (stop using it immediately).
• It is more than 5 years old and you depend on it daily.

Final Thoughts on NOCO Charging Frequency

Keeping your NOCO jump starter ready is not hard. It just takes a little routine. Charge it every three months. Store it at room temperature. Check the lights before you hit the road.

That five minutes of attention could save you from being stranded. It could get you to work on time. It could help a stranger in a parking lot. A reliable jump starter is like a good spare tire. You hope you never need it. But you are very glad it works when you do.

I am Alex Rahman. After years of testing these devices, I trust NOCO. But trust is earned through care. Take care of your NOCO, and it will take care of you.

Frequently Asked Questions

Can I overcharge my NOCO jump starter?

No. NOCO jump starters have a built-in battery management system. This system stops charging automatically when the battery is full. You can leave it plugged in overnight without damage. But do not leave it plugged in for weeks or months at a time.

How do I know if my NOCO battery is bad?

Press the power button to check the charge level. If the lights do not turn on, the battery is completely dead. If it shows 100 percent but fails to start a small engine, the battery has lost its capacity. In both cases, replacement is needed.

Can I use my NOCO while it is charging?

NOCO does not recommend this. The user manual says not to charge and discharge at the same time due to FCC regulations. For best results and safety, charge the unit fully before attempting to jump start a vehicle.

Will a NOCO jump starter work in cold weather?

Yes, but with reduced performance. NOCO tests their units down to -30°C (-22°F) [citation:9]. However, lithium batteries lose power in extreme cold. Keep the unit warm inside your vehicle’s cabin, not in the trunk, before use in winter.

How often should I charge a new NOCO out of the box?

Charge it immediately. NOCO jump starters come partially charged from the factory. But they may have been sitting in a warehouse for months. Give it a full charge before first use. This takes 3 to 7 hours depending on the model [citation:3].