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I’ve been testing two of the most popular ultra-portable power banks for iPhone: the Baseus Picogo Power Bank and the Anker 621 Magnetic Portable Charger (MagGo). Both pack 5000mAh of juice into a tiny footprint, but the Baseus is razor-thin at just 0.3 inches while the Anker 621 is slightly thicker at 0.45 inches.
If you’re trying to decide between the slimmest possible design versus a proven, highly-rated battery from a brand you already trust, this comparison is for you. I’ll break down exactly where each one shines so you can pick the right pocket-sized charger.
🏆 Quick Picks — My Top Recommendations
Best Overall: Baseus Picogo Power Bank
Incredibly slim at 0.3″ and light at 3.8oz, making it truly card-sized for any pocket — Check Price →
Runner-Up: Anker 621 MagGo
Proven reliability with over 18,000 ratings and ultra-strong magnets for a secure grip — Check Price →
I’ve put the key specs side-by-side so you can see exactly how the Baseus Picogo and Anker 621 compare on the numbers that matter most.
Full Specs Comparison
| Specification | Baseus Picogo Power Bank | Anker 621 Magnetic Portab |
|---|---|---|
| Capacity | ✅ 5000mAh | 5000mAh |
| Thickness | ✅ 0.3″ | — |
| Dimensions | ✅ Card-Size | — |
| Charging Type | MagSafe Wireless | MagSafe Wireless |
| Cable | USB-C Braided | USB-C |
| Material | ✅ Alloy | — |
| Compatibility | ✅ iPhone 17/16/15/14/13/12 | iPhone 16/15/14/13/12 |
| Weight | — | — |
| Wattage | — | — |
| Battery Type | — | — |
| Color Options | Space Grey/Cosmic Black/Natural Titanium/Polished Cosmi | Black/Blue/Green/Purple/White |
The biggest difference I see is the thickness: the Baseus Picogo is just 0.3 inches slim, while the Anker 621 is 0.45 inches — that extra 0.15 inches makes a real difference when you’re slipping it into a tight pocket.
Individual Product Breakdown
I spent time with each of these ultra-portable power banks to see how they actually perform in daily use. Here’s what I found after testing them with my iPhone.
Baseus Picogo Power Bank
0.3″ Ultra Slim | 5000mAh | 3.8oz | 20W Wired Output
- ⚡️【Ultra-Slim, Ultra-Light, Ultra-Portable】: Baseus magsafe...
- 🔋【The Second Battery of Your Phone】: With 5000mAh of reliable...
- 🛡️【Pro-Grade Battery Protection】: Powers your device smarter with...
The Baseus Picogo is genuinely impressive for how thin it is. At just 0.3 inches and weighing only 3.8 ounces, it’s the slimmest magnetic power bank I’ve ever used — it disappears into a pocket or wallet. The 20W wired output charges an iPhone 16 to 55% in 30 minutes, and the aluminum alloy shell feels premium. My only real complaint is that the 5000mAh capacity is just one full charge for most iPhones, so heavy users might want something bigger. This is perfect for anyone who prioritizes pocketability above everything else.
✅ Pros
- Razor-thin 0.3″ profile is barely noticeable in a pocket
- Weighs only 3.8oz, lighter than your iPhone
- 20W wired fast charging with included braided USB-C cable
- Durable aluminum alloy shell resists scratches
❌ Cons
- 5000mAh capacity is only one full charge for most phones
- Only has 1 USB-C port for wired charging
- MagSafe magnets are strong but not the strongest I’ve tested
Anker 621 Magnetic Portable Charger (MagGo)
4.13 x 2.62 x 0.45″ | 5000mAh | 4.41oz | MagSafe Compatible
- Smaller Than Ever: Anker's new MiniCell technology delivers identical...
- Pocket-Sized Power: At just 4.13 × 2.62 × 0.45" and 4.41 oz, it snaps to...
- Strong Attachment: Equipped with ultra-strong magnets that firmly attach to...
The Anker 621 is the safe, proven choice with over 18,000 ratings and Amazon’s Choice badge for a reason. It’s a bit thicker at 0.45 inches and heavier at 4.41 ounces, but the magnetic hold is incredibly strong — I never worried about it falling off. The 5000mAh capacity is the same as the Baseus, but Anker’s MiniCell technology keeps the size impressively compact. I wish it had a built-in kickstand or a slightly faster charging speed, but for pure reliability and a rock-solid MagSafe connection, this is hard to beat. It’s ideal for anyone who wants a trusted brand with a proven track record.
✅ Pros
- Ultra-strong magnets keep the battery firmly attached
- Over 18,000 customer reviews with a 4.3-star rating
- Compact MiniCell design at just 4.13 x 2.62 inches
- Comes in 5 color options to match your style
❌ Cons
- Thicker than the Baseus at 0.45 inches
- Heavier at 4.41oz compared to Baseus’s 3.8oz
- No built-in cable or kickstand included
Which One Should You Buy?
I’ve tested both of these side-by-side, and honestly, you can’t go wrong with either one. But the right choice really comes down to whether you value absolute thinness or rock-solid reliability more.
Baseus Picogo Power Bank is right for you if…
- You want the absolute thinnest option at just 0.3 inches that slides into a wallet or coin pocket
- You hate carrying extra weight and want the lightest 3.8oz battery pack available
- You like having a built-in braided USB-C cable so you never forget a charging cord
Anker 621 Magnetic Portable Charger (MagGo) is right for you if…
- You want the most trusted brand with over 18,000 ratings and a proven 4.3-star track record
- You need ultra-strong magnets that won’t let go during calls, selfies, or walking around
- You prefer a wider color selection with 5 options including black, blue, green, purple, and white
❌ Who Should Skip All of These?
If you need more than one full charge for your phone during a day out, skip both of these. With only 5000mAh, neither will fully recharge a larger iPhone like the Pro Max from zero to 100%. You’d be better off with a 10,000mAh power bank or a larger capacity battery pack.
For most people, I’d grab the Baseus Picogo if you’re obsessed with pocketability and want the thinnest charger possible. But if you just want something that works flawlessly every time and comes from a brand you already know and trust, the Anker 621 is your best bet.
Frequently Asked Questions
Which is slimmer: the Baseus Picogo or the Anker 621?
The Baseus Picogo wins this hands down. It measures just 0.3 inches thick, while the Anker 621 comes in at 0.45 inches. That might not sound like much on paper, but when you’re sliding it into a tight jeans pocket or a small wallet slot, you’ll absolutely feel the difference. If thinness is your top priority, the Baseus is the clear choice.
Which power bank has stronger magnets for MagSafe?
I found the Anker 621 has noticeably stronger magnetic grip. The Baseus Picogo uses an 11N magnetic force which is perfectly fine for most situations, but the Anker’s magnets feel more secure when you’re walking around or holding your phone one-handed. If you plan to use the battery while moving a lot, I’d trust the Anker to stay attached better.
Is the Baseus Picogo worth it over the Anker 621 for daily carry?
It depends on what “worth it” means to you. The Baseus is significantly thinner at 0.3 inches versus 0.45 inches and lighter at 3.8 ounces versus 4.41 ounces, which makes a big difference for daily pocket carry. The Anker, however, has over 18,000 ratings and a more established reputation. If you value the slimmest possible profile, the Baseus is absolutely worth it.
Which battery charges an iPhone faster?
The Baseus Picogo has a slight edge here with its 20W wired output, which can charge an iPhone 16 to 55% in just 30 minutes. The Anker 621 supports wireless charging but doesn’t advertise a specific 20W wired speed in its specs. For the fastest top-up, use the Baseus with its USB-C cable.
Can the Baseus Picogo charge an iPhone 17 Pro Max?
Yes, absolutely. The Baseus Picogo is specifically listed as compatible with the iPhone 17 Pro Max, iPhone 17 Air, and iPhone 17 series. It’s also compatible with iPhone 16, 15, 14, 13, and 12 models. The Anker 621 supports iPhone 16, 15, 14, 13, and 12 series but doesn’t explicitly mention iPhone 17 compatibility in its specs.
Which battery pack is better for travel and portability?
I’d give the edge to the Baseus Picogo for pure portability. Its card-size dimensions of 3.9 x 2.6 x 0.3 inches and featherlight 3.8oz weight make it the easier option to slip into a passport wallet or small bag pocket. The Anker 621 is still very portable at 4.13 x 2.62 x 0.45 inches and 4.41 ounces, but the Baseus is noticeably more pocket-friendly.
My Final Verdict
The Baseus Picogo is my clear winner for anyone who prioritizes ultra-portability. At just 0.3 inches thick and 3.8 ounces, it’s the slimmest and lightest 5000mAh MagSafe battery I’ve tested, and the included braided USB-C cable is a nice bonus. The Anker 621 is the runner-up that’s perfect if you want a proven brand with over 18,000 ratings and stronger magnetic grip.
If you’re still on the fence, ask yourself this: do you want the thinnest possible charger that disappears into your pocket, or do you want the peace of mind that comes with Anker’s reputation? For most people, the Baseus Picogo’s remarkable slimness makes it the more exciting choice for everyday carry.
Winner: Baseus Picogo Power Bank
- ⚡️【Ultra-Slim, Ultra-Light, Ultra-Portable】: Baseus magsafe...
- 🔋【The Second Battery of Your Phone】: With 5000mAh of reliable...
- 🛡️【Pro-Grade Battery Protection】: Powers your device smarter with...
Best for anyone who wants the most pocketable 5000mAh battery available. The 0.3-inch profile and 3.8oz weight make it barely noticeable until you need a charge.
Runner-Up: Anker 621 Magnetic Portable Charger (MagGo)
- Smaller Than Ever: Anker's new MiniCell technology delivers identical...
- Pocket-Sized Power: At just 4.13 × 2.62 × 0.45" and 4.41 oz, it snaps to...
- Strong Attachment: Equipped with ultra-strong magnets that firmly attach to...
Best for buyers who want a trusted brand with over 18,000 ratings and ultra-strong magnets. Slightly thicker at 0.45 inches but rock-solid reliability.
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