Are NOCO Jump Starters Waterproof? IP65 Rating Explained

Most NOCO jump starters are water-resistant, not fully waterproof. They carry an IP65 rating, which means they’re completely dustproof and can handle rain, splashes, and water jets from any direction. But they’re not designed for submersion. Use them in the rain — just don’t drop them in a puddle.

You’re stuck on the side of the road. It’s raining. You grab your NOCO jump starter from the trunk and start wondering — will this thing survive the weather?

It’s a smart question. Electronics and water don’t mix well. I’m Alex Rahman, an automotive gear reviewer who’s tested portable power tools in all kinds of conditions. And I’ve put NOCO jump starters through their paces — including in wet weather.

Here’s what I found, and everything you need to know about NOCO’s water resistance before you depend on one.

What Does the NOCO IP65 Rating Actually Mean?

The term “waterproof” gets thrown around a lot. Most products that claim it aren’t truly waterproof. NOCO is honest about this.

NOCO rates its Boost jump starters at IP65. That’s an international standard set by the IEC (International Electrotechnical Commission). It tells you exactly how well a device resists dust and water.

Here’s how to read the number:

• IP stands for Ingress Protection.
• The first digit — 6 — means completely dustproof. No dust gets in, period.
• The second digit — 5 — means it handles water jets from any direction.

So IP65 = total dust protection + water jet resistance. That covers rain, splashes, and even a direct spray from a hose.

Now let’s look at what IP65 does not protect against — because that’s where people get into trouble.

Is IP65 the Same as Waterproof?

No — and this matters. IP65 is water-resistant, not waterproof.

Waterproof typically means a device can be fully submerged without damage. IP65 doesn’t include that. The “5” in IP65 means it can survive low-pressure water jets up to 12.5 liters per minute from a 6.3mm nozzle. That’s enough for driving rain and accidental splashes.

It’s not rated for:

• Submersion in water (even shallow)
• High-pressure water blasts
• Prolonged soaking or flooding

If you want submersion protection, you’d need IP67 (1 meter for 30 minutes) or IP68 (deeper and longer). NOCO’s standard Boost models don’t go that far.

Which NOCO Jump Starters Have IP65 Protection?

Good news — NOCO applies the IP65 rating consistently across their entire Boost lineup. Here’s a breakdown:

Model	Peak Amps	IP Rating	Best For
GB20	500A	IP65	Cars, motorcycles, ATVs (up to 4.0L gas)
GB40	1000A	IP65	Cars, SUVs, trucks (up to 6.0L gas)
GB50	1500A	IP65	Larger trucks, RVs (up to 7.0L gas)
GB70	2000A	IP65	Diesel trucks, boats, heavy vehicles

Every model in the Boost series uses the same IP65-rated enclosure. That’s a consistent build standard across the lineup — which is a good sign.

What Physical Features Protect NOCO Jump Starters from Water?

The IP65 rating doesn’t happen by accident. NOCO builds several layers of protection into each unit.

Rubberized Over-Molded Casing

The outer shell uses a rubber over-mold on the body. It cushions drops and creates a tight seal around the edges. This isn’t just for looks — it keeps water from sneaking in through seams.

Covered USB and Clamp Ports

Each port — including USB-A, USB-C, and the clamp cable port — has its own rubberized cover. These flaps stay shut when you’re not using the unit. They seal out dust, rain, and debris effectively.

Impact-Resistant Enclosure

NOCO uses a sealed, impact-resistant plastic enclosure around the internal lithium cells. This blocks water from working its way in through vibration cracks or micro-gaps that cheaper units develop over time.

Wide Operating Temperature Range

NOCO Boost jump starters operate from -20°C to 60°C (-4°F to 140°F). That means they keep working in wet-and-cold conditions like winter rain or sleet — where other units fail.

Can You Use a NOCO Jump Starter in the Rain?

Yes — and this is one of the most common real-world situations people worry about.

IP65 is specifically designed for exactly this scenario. Rain falls at low to moderate pressure and comes from above or at angles. An IP65-rated unit handles that without any issue.

Real NOCO GB70 owners on boating forums have confirmed this. One user described using it in pouring rain to start a dead boat engine — with no water damage or issues. That kind of field confirmation matters.

Here’s a practical guide for using your NOCO in wet conditions:

Can NOCO Jump Starters Get Wet from a Hose or Pressure Washer?

Here’s where it gets more nuanced. Let’s break it down.

Regular garden hose spray? Probably fine if brief. IP65 covers low-pressure jets up to 12.5 L/min.

High-pressure washer? No. That goes well beyond the IP65 limit. High-pressure water can force past seals that survive normal rain with ease.

The lesson is simple: don’t deliberately spray your jump starter with water. The rating covers accidental exposure — not intentional washing.

Is the NOCO Jump Starter Safe to Use Near Marine or Boat Environments?

This is where the GB70 gets a lot of attention. Boaters love it.

The IP65 enclosure makes NOCO units a solid choice for onboard use. Boats are naturally wet — spray, humidity, rain, and salt air are constant. The sealed casing handles all of that well.

Salt air is more corrosive than fresh water. But the rubberized shell and sealed ports give the NOCO a good barrier. Many marine users keep a GB70 as their primary emergency start device on board.

One thing to note: NOCO doesn’t specifically market any Boost model as a marine-rated device. But real-world use in marine conditions has been documented by actual users with consistently positive results.

For extra peace of mind in marine use, store the unit in the included carrying bag when not in use. That adds another layer between the device and the elements.

How Does NOCO’s IP65 Compare to Other Jump Starter Brands?

Not all jump starters carry an IP rating. Many cheaper brands skip the certification entirely and just use vague terms like “weather-resistant.” That tells you nothing specific.

NOCO publishing an IP65 rating means they’ve submitted the unit for formal testing under IEC 60529 standards. That’s real accountability — not marketing language.

Here’s a quick comparison of what different ratings mean for a jump starter buyer:

IP Rating	Dust Protection	Water Protection	Suitable For
No rating	Unknown	Unknown	Dry indoor use only
IP54	Dust-resistant	Splash-resistant	Light outdoor use
IP65 (NOCO)	Fully dustproof	Water jet resistant	Rain, splashes, outdoor roadside
IP67	Fully dustproof	1m submersion, 30 min	Wet environments, flooding risk
IP68	Fully dustproof	Deeper submersion	Extreme conditions

For most drivers, IP65 is the right balance. It covers every real-world roadside scenario without the added cost of higher submersion ratings you’ll never need.

What Are NOCO’s UltraSafe Safety Features Beyond Water Resistance?

Water resistance is just one piece of what makes NOCO jump starters stand out. The UltraSafe Technology system adds another layer of protection — specifically designed for safe use in stressful, high-stakes moments.

Spark-Proof Clamps

Traditional jumper cables create sparks when you connect them to a live battery. NOCO’s UltraSafe clamps don’t spark. They detect the battery’s polarity before allowing current to flow. That’s a critical safety feature, especially in wet conditions where a spark could be dangerous.

Reverse Polarity Protection

Connect the clamps backward — positive to negative — and most jump starters will short out. NOCO detects this error and alerts you with lights and sounds before anything bad happens. You can fix the connection safely and try again.

Overcharge and Overheat Protection

The internal management system shuts the unit down automatically if temperatures or voltage climb too high. This protects both the jump starter and your vehicle’s electronics during the boost.

How to Store Your NOCO Jump Starter to Preserve Water Resistance

IP65 protection can degrade over time if you don’t care for the unit properly. Rubber seals dry out. Port covers get torn or left open. Here’s how to keep it in top shape.

NOCO says the GB40 can hold its charge for up to one year. But regular top-up charges keep the lithium cells healthier and extend the life of the entire unit — including its sealed enclosure.

Can Cold and Freezing Weather Affect Water Resistance?

This is a smart edge-case question. Rubber seals can stiffen and crack in extreme cold. Cracked seals reduce water resistance — even on IP65 units.

NOCO’s operating range goes down to -20°C (-4°F). In that range, the unit still functions and the seals are engineered to hold. But extended storage at sub-zero temperatures — especially with repeated freeze-thaw cycles — can stress the rubber over time.

If you live somewhere with harsh winters, keep the NOCO inside your car’s cabin during the coldest months rather than in the trunk. It’ll be warmer, and you’ll also get better jump-start performance from the lithium cells.

For more on how lithium batteries perform in cold conditions, Battery University has excellent technical data on lithium-ion cold tolerance.

You can also check the IEC’s official IP rating standards if you want to dig into the technical specifications behind ingress protection ratings.

Conclusion

NOCO jump starters are genuinely water-resistant — rated IP65, which covers everything from light rain to direct water spray. They’re not waterproof in the submersion sense, but they’re built tough enough for real roadside emergencies in wet weather.

Keep the port covers closed, store it properly, and it’ll hold up for years. If you’re ready to grab one, the GB40 is the best starting point for most drivers. I’m Alex Rahman, and I hope this breakdown helps you pick — and use — the right jump starter with confidence.

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