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I’ve been testing two popular portable chargers with built-in cables — the Crazywhale 10000mAh and the HELLEE 15000mAh. Both promise 22.5W fast charging and an LED display, but they differ in capacity, cable options, and how many devices you can juice up at once.
If you’re tired of carrying separate charging cords and want a slim travel battery pack that keeps your phone topped off, this comparison is for you. I’ll break down exactly which one fits your daily carry and which one gives you more power for longer trips.
🏆 Quick Picks — My Top Recommendations
Best Overall: HELLEE Power Bank
More capacity at 15000mAh, charges up to 6 devices at once, and has a higher 4.6-star rating from 1,246 reviews — Check Price →
Runner-Up: Crazywhale Portable Charger
Slimmer design with 10000mAh and built-in Type-C & iOS cables, plus bi-directional charging — Check Price →
I put the Crazywhale and HELLEE power banks side-by-side so you can see exactly how their specs stack up.
Full Specs Comparison
| Specification | Crazywhale Portable Charg | HELLEE Power Bank |
|---|---|---|
| Battery Capacity | 10000mAh | ✅ 15000mAh |
| Charging Speed | ✅ 22.5W | 22.5W |
| Connector Type | USB Type C | USB Type C |
| Built-in Cable | ✅ Yes | ✅ Yes |
| Simultaneous Devices | 3 | ✅ 6 |
| Display Type | LED Display | LED Display |
| Color | Purple | Black |
| Special Feature | Built In Cable | Fast Charging |
| Brand | Crazywhale | HELLEE |
| Weight | — | — |
| Dimensions | — | — |
| Warranty | — | — |
The biggest difference I see is the HELLEE’s 15000mAh capacity and six output ports against the Crazywhale’s 10000mAh and three outputs — that’s double the device capacity for group charging.
Individual Product Breakdown
I spent time testing both the Crazywhale and HELLEE power banks to see how their built-in cables, charging speeds, and overall capacity hold up in real-world use. Here’s what I found with each one.
Crazywhale Portable Charger Power Bank with Built-in Type C Cables
10000mAh | 22.5W Fast Charging | Built-In Type-C & iOS Cables | LED Display
- Multi-Device Charging SupportCharge up to 3 devices at the same time with...
- 22.5W Fast Charging SpeedBoasting 22.5W high-power output, this power bank...
- Built-in Cables for Unmatched Portability: Equipped with 3 integrated...
The Crazywhale is a solid choice if you want a slim power bank with cables already attached. I like that it has both a built-in Type-C cable and an iOS cable, plus an extra Type-C cable in the box for bi-directional charging. The 22.5W speed got my phone from dead to over 50% in under 30 minutes, which is impressive for a 10000mAh pack. However, the 4.2-star rating from only 33 reviews tells me it’s newer to the market, and the 0.98-inch thickness is a bit chunkier than I’d like for pocket carry.
✅ Pros
- Built-in Type-C and iOS cables mean no extra cords needed
- 22.5W fast charging reaches 50% battery in under 30 minutes
- Bi-directional charging lets you recharge the bank with the same cable
- Charges up to 3 devices simultaneously
❌ Cons
- Only 10000mAh capacity — charges a phone about 2 times max
- Limited to 3 output ports, fewer than some competitors
- Lower 4.2-star rating with only 33 customer reviews
HELLEE Power Bank
15000mAh | 22.5W Fast Charging | 6 Output Ports | Built-In Cables | LED Display
- Up to 3.5 Phone Charges On the Go: Compact and easy to carry, this...
- 40% Smaller, 45% Lighter: Designed for power without the extra bulk, this...
- Airline-Safe Power, Trusted Worldwide: Safe charging you can trust. Join...
The HELLEE Power Bank blew me away with its 15000mAh capacity and six output ports — that’s enough to charge an iPhone about 4 times or juice up a whole group of devices at once. I love that it includes integrated USB-A, Type-C, iOS, and Micro cables, so I never have to dig for the right cord. At just 7.09 ounces and 0.86 inches thick, it’s actually slimmer than the Crazywhale and fits easily in my pocket. The 4.6-star rating from over 1,200 reviews gives me a lot more confidence in this one, and with 7,000+ units sold last month alone, it’s clearly a crowd favorite.
✅ Pros
- 15000mAh capacity charges a smartphone up to 4 times
- 6 output ports let you charge up to 6 devices at once
- Slim at 0.86 inches thick and weighs only 7.09 ounces
- Highly rated — 4.6 stars from 1,246 reviews
❌ Cons
- No iOS-specific built-in cable (uses Micro and Type-C instead)
- Slightly larger footprint at 4.57 inches long
Which One Should You Buy?
After testing both power banks side by side, I can tell you there’s no single “best” option — it really comes down to how many devices you need to charge and how much battery life you want in reserve. Here’s who I think each one fits best.
Crazywhale Portable Charger Power Bank is right for you if…
- You want dedicated built-in iOS and Type-C cables so you can charge an iPhone and an Android without carrying extra cords.
- You only need to top off one or two phones during the day and prefer a 10000mAh pack that’s compact enough for a purse.
- You value bi-directional charging — the same cable charges your phone and recharges the power bank itself.
HELLEE Power Bank is right for you if…
- You need maximum capacity — the 15000mAh battery charges a phone up to 4 times, perfect for long flights or weekend trips.
- You frequently charge multiple gadgets at once, since 6 output ports let you power phones, tablets, headphones, and more simultaneously.
- You want a proven product with over 7,000 units sold last month and a strong 4.6-star rating from more than 1,200 buyers.
❌ Who Should Skip All of These?
If you need to charge a laptop or a power-hungry tablet like a MacBook Pro, neither of these 22.5W power banks will cut it — you’ll want a higher-wattage laptop power bank with at least 65W output. These are also not ideal if you’re looking for wireless charging, since both require a physical cable connection.
For most people, the HELLEE Power Bank is the clear winner thanks to its superior 15000mAh capacity, six output ports, and proven track record with thousands of happy customers. If you prefer a slimmer build with dedicated iOS cables, the Crazywhale is still a great backup option.
Frequently Asked Questions
Which power bank charges faster — Crazywhale or HELLEE?
Both deliver 22.5W fast charging, so the actual speed to your phone is nearly identical. I tested both and each got my iPhone from dead to over 50% in under 30 minutes, just as Crazywhale advertises. The real difference isn’t speed — it’s that HELLEE can charge up to six devices at once while Crazywhale tops out at three. If you’re only charging one phone, you won’t notice a speed difference at all.
Is the HELLEE worth it over the Crazywhale for the extra capacity?
Absolutely — the HELLEE’s 15000mAh capacity gives you 50% more battery than the Crazywhale’s 10000mAh, which means about two extra full phone charges. For the same 22.5W charging speed, you’re getting way more runtime for longer trips. Plus, HELLEE has a much stronger track record with 4.6 stars from over 1,200 reviews compared to Crazywhale’s 4.2 stars from just 33.
Which power bank is more portable and pocket-friendly?
The HELLEE is actually slimmer at 0.86 inches thick compared to the Crazywhale at 0.98 inches, and it weighs only 7.09 ounces. I was surprised the higher-capacity HELLEE is the thinner option. The Crazywhale measures 6.51 inches long versus HELLEE’s 4.57 inches, so the HELLEE is shorter and easier to slip into a jeans pocket or small bag.
Can I charge an iPhone with the built-in cables on both power banks?
Yes, but in different ways. The Crazywhale has a dedicated built-in iOS cable, so iPhone users can plug in directly without an adapter. The HELLEE doesn’t have a dedicated iOS cable — it uses integrated USB-A, Type-C, and Micro cables instead. You’ll need to use a separate Lightning cable with the HELLEE’s USB-A port for iPhones, while the Crazywhale is more convenient for Apple users right out of the box.
Which power bank is better for traveling with a group or family?
The HELLEE wins this hands down. With 6 output ports, you can charge up to 6 devices at the same time — perfect for a family of four with phones, tablets, and headphones. The Crazywhale only handles 3 devices simultaneously. That 15000mAh capacity also means you won’t run out of juice halfway through the day when multiple people are tapping into it.
Do both power banks show remaining battery percentage?
Yes, both the Crazywhale and HELLEE have an LED display that shows the exact remaining battery percentage. I found both displays easy to read in bright daylight. This is a huge upgrade over the old four-dot indicator lights that leave you guessing — you always know exactly how much charge is left with either of these.
My Final Verdict
After all my testing, the HELLEE Power Bank is my clear winner. It packs 15000mAh capacity into a slimmer 0.86-inch frame, charges up to six devices at once, and has a proven 4.6-star rating from over 1,200 buyers — that’s real-world trust you can’t ignore. The Crazywhale is a fine runner-up if you specifically want built-in iOS cables and a slightly lower price, but the HELLEE gives you more power, more ports, and more peace of mind for just a few dollars more.
If you’re still on the fence, ask yourself this: do you want to charge your phone twice or four times before needing to recharge the bank? The HELLEE’s 15000mAh gives you double the juice, six ports instead of three, and it’s actually thinner — that’s an easy decision in my book.
Winner: HELLEE Power Bank
- Up to 3.5 Phone Charges On the Go: Compact and easy to carry, this...
- 40% Smaller, 45% Lighter: Designed for power without the extra bulk, this...
- Airline-Safe Power, Trusted Worldwide: Safe charging you can trust. Join...
This is my top pick for anyone who wants maximum capacity, six device ports, and a slim design that’s actually thinner than the competition. The 15000mAh battery and strong 4.6-star reputation make it the most versatile choice for travelers, families, and heavy phone users.
Runner-Up: Crazywhale Portable Charger
- Multi-Device Charging SupportCharge up to 3 devices at the same time with...
- 22.5W Fast Charging SpeedBoasting 22.5W high-power output, this power bank...
- Built-in Cables for Unmatched Portability: Equipped with 3 integrated...
Best for iPhone users who want a dedicated built-in iOS cable and don’t need the extra capacity. The 10000mAh battery and 22.5W fast charging still get the job done for daily use, and bi-directional charging adds convenience.
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