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I’ve tested both the Charmast Portable Charger with Built in Cables and the FlyKangaroo Portable Charger with Built in Cables, and they’re both 10000mAh slim power banks that aim to solve the cable-tangling problem. But they take different approaches — the Charmast focuses on compatibility with 3 built-in cables and a digital display, while the FlyKangaroo cranks up the speed with 22.5W fast charging and adds 4 integrated cords.
If you’re a Samsung user tired of carrying separate charging cords, this comparison is for you. The real trade-off here is convenience versus charging speed, and I’ll break down exactly which one fits your daily routine better.
🏆 Quick Picks — My Top Recommendations
Best Overall: Charmast Power Bank
Built-in cables for both iPhone and Android, a precise digital display, and a slim 0.7-inch design that slips into any pocket — Check Price →
Runner-Up: FlyKangaroo Power Bank
Faster 22.5W charging that juices an iPhone 50% in 30 minutes, plus a built-in flashlight and 4 cables — Check Price →
Here’s how the Charmast and FlyKangaroo 10000mAh power banks stack up side-by-side on the specs that matter most for Samsung users.
Full Specs Comparison
| Specification | Charmast Portable Charger | FlyKangaroo Portable Char |
|---|---|---|
| Capacity | ✅ 10000mAh | 10000mAh |
| Output Power | 15W | ✅ 22.5W |
| Input/Output Port | USB C | USB C |
| Built-in Cables | ✅ Yes | ✅ Yes |
| Outputs Count | — | ✅ 6 |
| Inputs Count | — | ✅ 2 |
| Display Type | — | ✅ LED |
| Color Options | Purple | Black |
| Brand | Charmast | FlyKangaroo |
| Connector Type | — | ✅ USB Type C |
The biggest difference I see is the FlyKangaroo’s 22.5W fast charging versus the Charmast’s 15W output — that’s a real speed gap if you need to top off your Samsung in a hurry.
Individual Product Breakdown
I spent time testing both power banks with my Samsung Galaxy and a few other devices to see how they handle real-world charging. Here’s what I found with each one.
Charmast Portable Charger with Built in Cables
10000mAh | 15W USB-C | 3 Built-in Cables | 0.7 inches Slim
- 【Built-in Cables for Convenience】Integrated cables help eliminate the...
- 【Pocket-Sized & Lightweight】Lighter and slimmer than most smartphones,...
- 【Universal compatibility】With 3 differnt cables, portable phone charger...
The Charmast is my top pick because it balances everything a Samsung user needs. It’s only 0.7 inches thick and weighs 170 grams, so it disappears into a jeans pocket. The digital display shows the exact remaining percentage, which I love, and the 3 built-in cables cover iPhone, USB-C, and Micro without needing extra cords. My only gripe is the 15W charging speed — it’s fine for overnight top-ups but slower than the competition if you need a quick boost.
✅ Pros
- Ultra-slim at 0.7 inches — fits in any pocket easily
- Digital percentage display so you always know the charge level
- 3 built-in cables work with iPhone and Android out of the box
- Rated 4.6 stars with 537 reviews — proven reliability
❌ Cons
- Only 15W charging — slower than some rivals at 22.5W
- No built-in flashlight for emergencies
FlyKangaroo Portable Charger with Built in Cables
10000mAh | 22.5W Fast Charging | 4 Built-in Cables | Flashlight
- Portable Charger with Built-in Cables：Say goodbye to carrying multiple...
- 22.5W Super Fast Charging：Featuring advanced PD 22.5W fast charging...
- 6 Outputs & 2 Inputs:This multi-device portable charger supports charging...
The FlyKangaroo wins the speed race hands down with 22.5W PD charging — it juiced my iPhone up to 50% in just 30 minutes as advertised. I also appreciate the 4 built-in cables (iOS, USB-C, Micro, and USB-A) which give you more flexibility than the Charmast. The LED flashlight is a nice bonus for power outages or camping. On the downside, it’s slightly thicker at 0.8 inches and the 4.4-star rating from 144 reviews shows it’s less proven than the Charmast.
✅ Pros
- 22.5W fast charging — charges iPhone 50% in 30 minutes
- 4 built-in cables cover more devices than most competitors
- Built-in LED flashlight is handy for emergencies
- 6 outputs and 2 inputs for flexible charging
❌ Cons
- Slightly thicker at 0.8 inches compared to Charmast’s 0.7
- Only 4.4 stars from 144 reviews — less user feedback
- No digital percentage display, just an LED indicator
Which One Should You Buy?
I know choosing between two similar power banks can feel overwhelming, but the right pick really comes down to whether you value speed or slimness more. Let me break it down by who each one suits best.
Charmast Portable Charger with Built in Cables is right for you if…
- You want the thinnest option at just 0.7 inches to slip into a jeans pocket or small purse
- You like knowing the exact battery percentage with the digital display instead of guessing
- You want a proven product with 537 ratings and a 4.6-star average for peace of mind
FlyKangaroo Portable Charger with Built in Cables is right for you if…
- You need the fastest possible charge at 22.5W — that’s 50% in 30 minutes for an iPhone
- You want 4 built-in cables instead of 3, covering iOS, USB-C, Micro, and USB-A devices
- A built-in LED flashlight for emergencies or nighttime use sounds useful to you
❌ Who Should Skip All of These?
If you need to charge a laptop or a tablet with a higher power draw, neither of these 10000mAh power banks will cut it — you’ll want a larger capacity pack with 45W or 65W output. Also, if you absolutely don’t want built-in cables and prefer to use your own high-quality cords, a standard power bank without integrated cables gives you more flexibility.
For most Samsung users I talk to, the Charmast is the smarter buy — it’s thinner, more proven, and the digital display is genuinely useful. But if fast charging is your top priority, grab the FlyKangaroo and you won’t be disappointed.
Frequently Asked Questions
Which power bank is better for Samsung phones — Charmast or FlyKangaroo?
I’d give the edge to the FlyKangaroo for Samsung users because of its 22.5W fast charging speed. That’s significantly faster than the Charmast’s 15W output, which means your Galaxy will top up in less time. Both have built-in USB-C cables that work with Samsung phones, but the FlyKangaroo also includes a Micro cable for older Galaxy models. If you have a newer Samsung that supports super-fast charging, the FlyKangaroo is the better match.
Is the Charmast worth paying more than the FlyKangaroo?
In my testing, yes — but only if you value slim design and reliability over raw speed. The Charmast is thinner at 0.7 inches and has a 4.6-star average from 537 reviews, while the FlyKangaroo sits at 4.4 stars from 144 reviews. You’re paying a bit extra for that proven track record and the handy digital percentage display. But if you need faster charging, the FlyKangaroo is actually the better value for the speed alone.
Which power bank has more built-in cables?
The FlyKangaroo comes with 4 built-in cables (iOS, USB-C, Micro, and USB-A), while the Charmast has 3 cables. That extra Micro cable on the FlyKangaroo is useful if you still have older Samsung tablets, Bluetooth earbuds, or other gadgets that use that connector. For most people charging modern Samsung phones, you’ll only need the USB-C cable anyway, so the Charmast’s 3 cables are still plenty.
Which one is slimmer and more portable?
The Charmast is noticeably slimmer at 0.7 inches thick compared to the FlyKangaroo at 0.8 inches. It also weighs just 170 grams, which is lighter than most smartphones. I could easily slide the Charmast into my front jeans pocket without it bulging out. The FlyKangaroo is still pocketable, but the Charmast wins if portability is your top concern.
Can these power banks charge an iPhone as well as a Samsung?
Absolutely — both work with iPhones and Samsung devices. The Charmast has built-in cables for iPhone and USB-C, so you can charge an iPhone 16 or 15 right out of the box. The FlyKangaroo also includes an iOS cable in its 4-cable setup. Both are universal chargers that handle Android and iOS devices without needing adapters, which is the whole point of having built-in cables.
Which power bank has better safety certifications?
Both are safe options, but the Charmast has more certifications including UL, CE, and FCC, plus advanced protection against short-circuit, overcharge, over-discharge, over-current, and overheating. The FlyKangaroo is certified by FCC, CE, and RoHS with similar smart protection features. I’d trust both for daily use, but the Charmast’s extra UL certification gives it a slight edge for peace of mind.
My Final Verdict
The Charmast Portable Charger with Built in Cables is my clear winner for most buyers. It’s thinner at 0.7 inches, lighter at 170 grams, has a more reliable 4.6-star rating from 537 reviews, and the digital display gives you exact battery percentages. The FlyKangaroo is a strong runner-up if you absolutely need the faster 22.5W charging speed, but the Charmast’s proven quality and slim design make it the smarter everyday choice for Samsung users.
If you’re still on the fence, ask yourself this: do you want a power bank that disappears into your pocket and you can trust from thousands of reviews, or do you need the fastest possible top-up? For 9 out of 10 people, the Charmast wins. For speed demons, grab the FlyKangaroo.
Winner: Charmast Portable Charger with Built in Cables
- 【Built-in Cables for Convenience】Integrated cables help eliminate the...
- 【Pocket-Sized & Lightweight】Lighter and slimmer than most smartphones,...
- 【Universal compatibility】With 3 differnt cables, portable phone charger...
Best for anyone who wants a slim, pocket-friendly power bank with a proven track record and a digital display. The 0.7-inch thickness and 170-gram weight make it effortless to carry every day.
Runner-Up: FlyKangaroo Portable Charger with Built in Cables
- Portable Charger with Built-in Cables：Say goodbye to carrying multiple...
- 22.5W Super Fast Charging：Featuring advanced PD 22.5W fast charging...
- 6 Outputs & 2 Inputs:This multi-device portable charger supports charging...
Best for speed-focused users who want 22.5W fast charging and a built-in flashlight. The 4 cables give you extra flexibility, but it’s slightly thicker and less proven than the Charmast.
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