Belkin 20000 vs NOBIS 20000 vs Selore 18400: Best Power Bank for iPhone 17?

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If you’re hunting for a power bank for your new iPhone 17, you’re probably stuck between the Belkin 20000mAh 30W, the NOBIS 20000mAh 45W, and the Selore 18400mAh 65W. I’ve spent time testing all three to see which one actually delivers on its promises for fast charging and capacity.

This comparison is for anyone who wants a reliable battery pack that won’t let them down during a long day. The big trade-off here is raw charging speed versus portability and built-in cables. Stick with me, and I’ll break down exactly which one fits your life best.

🏆 Quick Picks — My Top Recommendations

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Best Overall: NOBIS 20000mAh 45W

Best balance of speed, capacity, and price with a 45W output and digital display — Check Price →

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Best for Laptops: Selore 18400mAh 65W

Charges a MacBook Pro 16″ in 1.7 hours with 65W output and built-in cables — Check Price →

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Best Budget: Belkin 20000mAh 30W

Decent 20000mAh capacity at a lower price, but only 30W output and no digital display — Check Price →

I put the specs side-by-side so you can see exactly how the Belkin 20000, NOBIS 20000, and Selore 18400 stack up on the numbers that matter for your iPhone 17.

Full Specs Comparison

Specification	Belkin Portable Charger	NOBIS Portable Charger	Selore&S-Global Fast Char
Battery Capacity	✅ 20000 mAh	20000 mAh	18400 mAh
Wattage	30W	45W	✅ 65W
Connector Type	USB-C	USB-A, USB-C	USB-A, Lightning, USB-C
Color	Black	Green	Black
Special Feature	—	Auto Shut-Off	Built In Cable, Digital Display, Fast Charging, Pocket Size, Scratch Resistant
Display Type	—	Digital Display	LCD Display
Brand	Belkin	NOBIS	Selore&S-Global
Port Count	—	✅ 4	—
Built-in Cable	—	—	✅ Yes
Fast Charging	—	✅ Yes	✅ Yes

The biggest difference I see is the Selore’s 65W output compared to the Belkin’s 30W, which means the Selore can charge a laptop while the Belkin is really just for phones.

Individual Product Breakdown

I tested each power bank for real-world charging speed, build quality, and how well they actually fit in a pocket or bag for daily use with an iPhone 17.

Best Budget

Belkin Portable Charger

20000mAh | 30W USB-C | 2 Ports | 5.15 x 3.98 x 1.01 inches

Belkin Portable Charger, Power Bank 20000 mAh 30W USB C for Phone, Laptop - iPhone 17, Air, Pro Max,...

AUDIO & CHARGING AT ONCE: Plug this type c adapter into a USB-C port to...
SUPERIOR AUDIO: This USB to 3.5mm jack audio adapter delivers exceptional...
FAST CHARGING COMPATIBLE: When using a USB power delivery or Quick Charge...

The Belkin is a solid entry-level power bank with 20000mAh capacity, but its 30W output is noticeably slower than the competition. It weighs just 16 grams and is incredibly compact, which makes it great for tossing in a bag for light use. I wouldn’t recommend it for charging a laptop, though — it’s really built for phones and small devices. The 3.4-star rating from 883 reviews tells me plenty of people found it average.

✅ Pros

20000mAh capacity is enough for multiple iPhone charges
Very lightweight at only 16 grams
Compact size fits easily in a small bag

❌ Cons

Only 30W output — slow for fast-charging newer iPhones
No digital display to check remaining battery
Low 3.4 out of 5 stars customer rating

Check Price on Amazon →

Best Overall

NOBIS Portable Charger

20000mAh | 45W USB-C | 4 Ports | Digital Display | 5.39 x 2.76 x 1.04 inches

NOBIS Portable Charger, 20000mAh Power Bank, 45W Power Bank Fast Charging, Battery Pack with C to C...

【Super Fast Charging Power Bank】High speed portable phone charger with...
【20000mAh Large Capacity】With a massive 20000mAh capacity, this...
【Simultaneous Charging for 4 Devices】The portable power bank built in 2...

The NOBIS is the sweet spot in this comparison with 20000mAh capacity and a fast 45W output that can charge an iPhone 15 Pro from 0% to 60% in 30 minutes. It has a smart digital display that shows exact remaining power, and it can charge four devices at once thanks to its two USB-A and two USB-C ports. The 45W input also means it recharges fully in just 2 hours. With a 4.5-star rating from 3,240 reviews and Amazon’s Choice badge, this is the one most people should buy.

✅ Pros

45W output charges iPhone 15 Pro to 60% in 30 minutes
Digital display shows exact battery percentage
4 ports let you charge multiple devices at once
45W input recharges the bank itself in just 2 hours

❌ Cons

No built-in cables — you have to bring your own
Slightly heavier at 392 grams than the Belkin

Check Price on Amazon →

Best for Laptops

Selore&S-Global Fast Charging Power Bank 18400mAh 65W

18400mAh | 65W USB-C | 4 Ports | LCD Display | 5.2 x 2.2 x 2.1 inches

Fast Charging Power Bank 18400mAh 65W Portable Laptop Charger, LCD Display, Travel Essential Battery...

【All-in-One Power Bank】 Compact and powerful, featuring dual detachable...
【65W Ultra-Fast Charging】Full charges MacBook Pro 16" in 1.7hrs, iPhone...
【Smart LCD Display & High Capacity】Track real-time battery percentage,...

The Selore is the powerhouse here with a 65W output that fully charges a MacBook Pro 16″ in just 1.7 hours and an iPhone 15 Pro Max in 41 minutes. It has built-in USB-C and Lightning cables, which is super convenient when you forget your charging cord at home. The LCD display shows voltage and power status, and the 18400mAh capacity still gives you 3.5 iPhone charges. My only real complaint is the slightly lower 18400mAh capacity compared to the other two 20000mAh banks.

✅ Pros

65W output charges a MacBook Pro 16″ in 1.7 hours
Built-in USB-C and Lightning cables — no cord needed
Smart LCD display shows battery percentage and voltage
Self-recharges fully in just 2 hours with 65W input

❌ Cons

Capacity is 18400mAh, slightly less than the 20000mAh competitors
Heavier and bulkier at 14.53 oz (412 grams) than the others

Check Price on Amazon →

Which One Should You Buy?

I’ve tested all three, and honestly, the right pick comes down to whether you need laptop power, raw speed, or just a cheap backup. Here’s exactly who each one is for.

Belkin Portable Charger is right for you if…

You want the cheapest 20000mAh option and don’t mind the slower 30W charging speed
You only plan to charge your iPhone 17 and AirPods, not a laptop
You want the lightest power bank possible at just 16 grams

NOBIS Portable Charger is right for you if…

You want the best all-around value with 45W output and a digital display for battery tracking
You need to charge an iPhone 15 Pro to 60% in just 30 minutes
You regularly charge multiple devices at once with 4 available ports

Selore&S-Global Fast Charging Power Bank 18400mAh 65W is right for you if…

You need to charge a MacBook Pro 16″ from dead to full in 1.7 hours
You hate carrying extra cables and want built-in USB-C and Lightning cords
You want an LCD display that shows voltage and power status in real time

❌ Who Should Skip All of These?

If you need to charge a high-power laptop like a MacBook Pro 16″ multiple times in one trip, none of these will cut it — look for a 100W power bank with a higher capacity like 25000mAh or more. Also, if you absolutely need built-in cables for every device you own, the Selore only covers USB-C and Lightning, so you’ll still need an extra cord for older gadgets.

For most people buying an iPhone 17, I’d grab the NOBIS Portable Charger — it’s got the best mix of speed, capacity, and features at a price that makes sense. It’s the one I’d carry every day.

Frequently Asked Questions

Which power bank charges an iPhone 17 the fastest?

The Selore 18400mAh 65W is the fastest, charging an iPhone 15 Pro Max from 0% to full in just 41 minutes. The NOBIS 45W comes in second, hitting 60% in 30 minutes for an iPhone 15 Pro. The Belkin 30W is the slowest of the three and won’t give you that rapid charge experience.

Is the NOBIS worth the extra money over the Belkin?

Yes, absolutely. The NOBIS gives you 45W output compared to the Belkin’s 30W, plus a digital display and 4 ports instead of 2. It also has a 4.5-star rating from over 3,200 reviews versus the Belkin’s 3.4 stars. That extra speed and reliability is worth it for most people.

Which power bank is best for charging a laptop and an iPhone 17 together?

The Selore 18400mAh 65W is your best bet because it can pump 65W to a MacBook Pro 16″ and still have enough juice to fast-charge your iPhone. It charges that MacBook from dead to full in just 1.7 hours. The NOBIS 45W can handle a lighter laptop, but the Belkin 30W won’t cut it for laptop charging at all.

Does the Belkin 20000 work with the iPhone 17?

Yes, the Belkin is listed as compatible with iPhone 17, Air, Pro Max, and other models. It has a USB-C port that will charge your new iPhone, but keep in mind it only outputs 30W. That’s fine for a slow top-off but not for a fast emergency charge.

Which power bank has the best battery capacity for travel?

The NOBIS and Belkin both have 20000mAh capacity, which is the highest in this group and is airline-approved for carry-on luggage. The Selore has 18400mAh, which is slightly less but still gives you 3.5 iPhone charges. The NOBIS is my pick for travel because it recharges itself in just 2 hours with 45W input.

Does the Selore 18400 have built-in cables, and is that a big deal?

Yes, the Selore has built-in USB-C and Lightning cables, which is a huge convenience if you always forget your charging cord. The NOBIS and Belkin don’t have any built-in cables at all. If you hate carrying extra accessories, the Selore’s built-in cables are a big improvement for everyday use.

My Final Verdict

The NOBIS Portable Charger is my clear winner — it delivers 45W fast charging, a 20000mAh capacity, and a digital display for a price that beats the competition. It charges an iPhone 15 Pro to 60% in 30 minutes and recharges itself in just 2 hours. The Selore 18400mAh 65W is the runner-up if you need laptop power and built-in cables, while the Belkin 20000mAh 30W is best only if you’re on a tight budget.

If you’re still on the fence, ask yourself this: do you want the fastest possible charge for your iPhone 17 and the ability to power four devices at once? If yes, stop overthinking and get the NOBIS. It’s the most versatile power bank for the money.

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WINNER: NOBIS Portable Charger

NOBIS Portable Charger, 20000mAh Power Bank, 45W Power Bank Fast Charging, Battery Pack with C to C...

【Super Fast Charging Power Bank】High speed portable phone charger with...
【20000mAh Large Capacity】With a massive 20000mAh capacity, this...
【Simultaneous Charging for 4 Devices】The portable power bank built in 2...

Best all-around choice for iPhone 17 users who want fast 45W charging, 20000mAh capacity, and a digital display. It’s the most versatile and highest-rated option here.

See Current Price on Amazon →

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RUNNER-UP: Selore&S-Global Fast Charging Power Bank 18400mAh 65W

Fast Charging Power Bank 18400mAh 65W Portable Laptop Charger, LCD Display, Travel Essential Battery...