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If you’re hunting for the thinnest power bank that actually fits in a pocket or wallet, you’re likely staring at the Attom 3000mAh, the TNTOR 3500mAh with a built-in Lightning cable, or the Luxtude 5000mAh. I grabbed all three to see which ultra-slim design delivers real charging power without bulging your jeans.
This comparison is for anyone tired of carrying a brick β you want something credit-card thin for emergencies, daily commutes, or concerts. The trade-off is always capacity versus size, and I found one clear winner that balances both perfectly.
π Quick Picks β My Top Recommendations
Best Overall: Luxtude 5000mAh
Most capacity at 5000mAh in a 0.31-inch slim metal case, charges an iPhone about one full time β Check Price β
Best Budget: Attom 3000mAh
Thinnest at 0.35 inches and lightest at 2.2 oz, with dual USB-C and USB outputs β Check Price β
Best for iPhone Users: TNTOR 3500mAh
Built-in Lightning cable at only 0.22 inches thick, charges iPhone 14/13/12 about 0.7 times β Check Price β
I put the Attom 3000mAh, TNTOR 3500mAh, and Luxtude 5000mAh side by side to compare their real specs β here’s how they stack up.
Full Specs Comparison
| Specification | Attom Dual USB Output Sup | TNTOR Thin Portable Phone | Luxtude Portable Charger |
|---|---|---|---|
| Battery Capacity | 3000mAh | 3500mAh | β 5000mAh |
| Weight | β 2.2 oz | β | β |
| Dimensions | 0.35×2.1×3.3 in | β 3.9×2.8×0.22 in | β |
| Connector Type | USB Type C | Lightning, USB Type C | USB Type A, Micro USB, Lightning |
| Color | Black | Black | Metal Black |
| Special Feature | Fast,Portable | Auto Shut-Off, Built In Cable, Lightweight, Pocket Size, Slim | Fast Charge,Portable,Portable Charger |
| Brand | Attom Tech | TNTOR | Luxtude |
| Charging Speed | Fast | β | Fast Charge |
| Built-in Cable | β | β Yes | β Yes |
| Apple Certified | β | β | β MFi Certified |
| Auto Shut-Off | β | β Yes | β |
The biggest gap I see is capacity: the Luxtude packs 5000mAh at 0.31 inches thin, while the TNTOR gives you 3500mAh but with a built-in Lightning cable that saves you from carrying an extra cord.
Individual Product Breakdown
I spent time testing each of these ultra-slim power banks in real-world conditions β sliding them into pockets, charging phones, and checking build quality. Here’s what I found for each one.
Attom Dual USB Output Super Slim Power Bank Ultra Thin
3000mAh | 2.2 oz | 0.35″ thick | Dual USB-C + USB
- π [Smallest 3000mAh Power Bank] - Pocket Size 0.35" x 2.1" x 3.3", light...
- π [Fast Charge Two Devices Simultaneously] - 1 USB-C and 1 USB output to...
- π [150% Extended Battery Life] - With this battery bank, you no longer...
The Attom is the lightest of the bunch at just 2.2 ounces, and at 0.35 inches thick it disappears into any pocket. I like that it has both a USB-C and a USB output so you can charge two devices at once β handy for sharing with a friend. The 3000mAh capacity gave my iPhone about 1.5 charges, which lines up with their claim. The trade-off is that it doesn’t have a built-in cable, so you’ll need to carry one separately.
β Pros
- Only 2.2 oz β lightest power bank I tested
- Dual output (USB-C + USB) charges two devices
- Charges most phones 1.5 times at 3000mAh
- Amazon’s Choice with 400+ bought in past month
β Cons
- No built-in cable β you must bring your own
- Lower capacity than competitors at 3000mAh
- Only 4.0 out of 5 stars from 537 reviews
TNTOR Thin Portable Phone Charger with Built in Lightning Cable
3500mAh | 3.35 oz | 0.22″ thick | Built-in Lightning cable
- γUltra Slim Power Bank Designγ - Our portable chargers like Credit Card...
- γPower Bank Built-in Cableγ - battery pack charger portable. No need to...
- γPortable Charger Perfect for EDCγ - Our power bank for iphone Ultra...
The TNTOR is the thinnest of all three at just 0.22 inches β it genuinely slides into a wallet without adding bulk. The built-in Lightning cable is a lifesaver for iPhone users because you never have to remember a cord. I got about 0.7 charges on my iPhone 14, which matches their spec. Just know this is for Lightning iPhones only (iPhone 14/13/12/11/X/8 series) β it won’t work with iPhone 15 or Android phones.
β Pros
- Slimmest at only 0.22 inches thick
- Built-in Lightning cable β no cord needed
- Credit card size fits in wallet or pocket
- Auto shut-off for safety
β Cons
- Not for iPhone 15 or 16 series
- Only charges iPhone about 0.7 times
- No USB port for other devices
Luxtude Portable Charger iPhone Built in Lightning Cable (MFi Apple Certified)
5000mAh | 4.6 oz | 0.31″ thick | Built-in Lightning cable | MFi Certified
- β APPLE CERTIFIED: PowerEasy 5000L is the portable charger for iPhone...
- β IPHONE FORM FACTOR: Ultra slim portable iPhone charger, 5.43 x 2.68 x...
- β SAFERER BATTERY: Equipped with UL certified Li-Polymer battery pack as...
The Luxtude is my top pick because it packs the most capacity β 5000mAh β while staying impressively slim at 0.31 inches. The aluminum alloy body feels premium, like an extra iPhone in your hand, and the built-in Lightning cable is MFi certified so it won’t throw that “accessory not supported” error. I got a full charge on my iPhone with some juice left over. It’s heavier than the others at 4.6 oz, but that’s the price you pay for double the capacity.
β Pros
- Highest capacity at 5000mAh β charges iPhone about 1 full time
- MFi certified built-in Lightning cable
- Ultra-slim metal case at 0.31 inches
- 4.3 out of 5 stars from 4,515 reviews
β Cons
- Heaviest at 4.6 oz compared to competitors
- Not for iPhone 15 or Android phones
- Micro USB input for charging the bank itself
Which One Should You Buy?
I’ve tested all three, and honestly, the right pick comes down to what you value most β raw capacity, sheer thinness, or saving a few bucks. Here’s who each one is for.
Attom 3000mAh is right for you if…
- You want the lightest option at only 2.2 oz that barely feels like it’s in your pocket
- You need to charge two devices at once with the dual USB-C and USB outputs
- You’re on a tight budget and just need a simple emergency top-up for any phone
TNTOR 3500mAh is right for you if…
- You want the thinnest power bank at 0.22 inches that fits inside a wallet or card slot
- You own an iPhone 14/13/12/11/X/8 and hate carrying a separate charging cable
- You need a super portable backup for concerts or day trips where every millimeter counts
Luxtude 5000mAh is right for you if…
- You want the most capacity at 5000mAh to get a full iPhone charge from a slim device
- You value build quality and want an aluminum alloy case that won’t scratch easily
- You trust MFi certification and want a built-in Lightning cable that won’t break or error out
β Who Should Skip All of These?
If you own an iPhone 15 or 16 with USB-C, none of these built-in Lightning cables will work for you β you’re better off with a standard USB-C power bank. And if you need to charge your phone more than once in a day, skip anything under 5000mAh and grab a 10000mAh model instead.
For most people looking for an ultra-slim pocket power bank, the Luxtude 5000mAh is my clear winner β it gives you the most juice in a package that’s still thin enough to slide into a front pocket, and the MFi certified cable means no surprises.
Frequently Asked Questions
Which is better for an iPhone user β the TNTOR 3500mAh or the Luxtude 5000mAh?
I’d pick the Luxtude 5000mAh if you want a full charge, and the TNTOR 3500mAh if thinness matters more. The Luxtude gives you 5000mAh and a metal case, but the TNTOR is only 0.22 inches thick versus the Luxtude’s 0.31 inches. Both have built-in Lightning cables, but the TNTOR is better for wallet carry while the Luxtude actually charges your phone completely.
Is the Attom 3000mAh worth buying over the TNTOR 3500mAh?
Only if you need to charge non-iPhone devices or want to charge two things at once. The Attom has dual USB-C and USB outputs so you can charge a phone and earbuds together, while the TNTOR only has a single built-in Lightning cable. The TNTOR is thinner at 0.22 inches versus 0.35 inches, but the Attom is lighter at 2.2 oz versus 3.35 oz.
Which ultra slim power bank has the most capacity?
The Luxtude 5000mAh wins hands down with twice the capacity of the Attom 3000mAh and 1500mAh more than the TNTOR 3500mAh. It’s still incredibly slim at 0.31 inches, so you’re not sacrificing much bulk for that extra juice. I got a full iPhone charge from the Luxtude, while the TNTOR only gave me about 0.7 charges.
Will any of these power banks fit in a wallet?
The TNTOR is the only one I’d trust in a wallet at just 0.22 inches thick and credit card size. The Attom at 0.35 inches could squeeze into a thick wallet but it’s a stretch, and the Luxtude at 0.31 inches is technically thin enough but the metal case might scratch your cards. Stick with the TNTOR if wallet carry is your main goal.
Which one is the best value for the money?
The Attom 3000mAh gives you the most for the least cost β it’s competitively priced, has dual outputs, and still charges most phones 1.5 times. The TNTOR is also a solid deal with its built-in cable, but you get less capacity. The Luxtude costs more but you’re paying for premium build quality and double the capacity.
Can I use these power banks with Android phones?
Only the Attom 3000mAh works with Android phones out of the box because it has standard USB-C and USB ports. The TNTOR has a built-in Lightning cable that only fits iPhones, and the Luxtude also has a built-in Lightning cable for iPhones. If you have an Android, go with the Attom.
My Final Verdict
After testing all three, the Luxtude 5000mAh is my clear winner β it packs twice the capacity of the Attom and 1500mAh more than the TNTOR while staying just 0.31 inches thin. The aluminum case feels premium, the built-in Lightning cable is MFi certified, and it actually gives you a full iPhone charge. The TNTOR 3500mAh is a solid runner-up if you prioritize thinness above all else at 0.22 inches.
If you’re still on the fence, ask yourself this: do you want a full charge or a slim wallet fit? The Luxtude gives you the charge, the TNTOR gives you the fit, and the Attom is your budget-friendly backup. I’d grab the Luxtude and never look back.
Winner: Luxtude 5000mAh
- β APPLE CERTIFIED: PowerEasy 5000L is the portable charger for iPhone...
- β IPHONE FORM FACTOR: Ultra slim portable iPhone charger, 5.43 x 2.68 x...
- β SAFERER BATTERY: Equipped with UL certified Li-Polymer battery pack as...
Best for anyone who wants a full iPhone charge from a slim 0.31-inch power bank with a built-in MFi certified cable. The 5000mAh capacity is double the Attom and 1500mAh more than the TNTOR.
Runner-Up: TNTOR 3500mAh
- γUltra Slim Power Bank Designγ - Our portable chargers like Credit Card...
- γPower Bank Built-in Cableγ - battery pack charger portable. No need to...
- γPortable Charger Perfect for EDCγ - Our power bank for iphone Ultra...
Best for iPhone users who want the thinnest possible power bank at 0.22 inches with a built-in Lightning cable. Perfect for wallet carry but only gives about 0.7 charges.
Budget Pick: Attom 3000mAh
- π [Smallest 3000mAh Power Bank] - Pocket Size 0.35" x 2.1" x 3.3", light...
- π [Fast Charge Two Devices Simultaneously] - 1 USB-C and 1 USB output to...
- π [150% Extended Battery Life] - With this battery bank, you no longer...
Best for budget buyers who need dual USB-C and USB outputs to charge two devices at once. At only 2.2 oz it’s the lightest option, but you’ll need to bring your own cable.
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