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Ultra-Slim Ultra-Portable Ultra-Safe 2500mAh Wallet Pocket Power Card Power Bank, ONE-for-All External Mini Battery for Most Smart Phone and Digital Devices(White with Lightning Adapter)

4.0 out of 5 stars 1,474 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Connector Type USB Type C, Lightning, Micro USB
Brand kolumb
Battery Capacity 2500 Milliamp Hours
Color 2500mAh White (Lightning adapter stored in module)
Special Feature Portable, pass-through

About this item

  • Ultra-slim: Similar Poker size with only 1/4 inch (6mm) thickness
  • Ultra-Portable: One-to-Go and One-for-All design, Build-In micro USB cable, and iPhone 5/6 Adapter
  • Ultra-Safe: NO Risk of ON FIRE nor EXPLOSION; Smart Control Tech, no Short-Crcuit, Over-Charge nor Over-Current for BOTH your devices and battery
  • Important Call Saver: NO power off, NO open your phone, NO stop, just Plug in and Continue
  • FCC-Vertificated, CE-Vertificated, RoHS-Vertificated, CCC-Vertificated, One year Warranty.
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PriceCurrently unavailable.-14% $59.95
List: $69.95		$25.99$18.99$19.95$66.99
Delivery—
Get it as soon as Friday, Apr 4
Get it as soon as Friday, Apr 4
Get it as soon as Friday, Apr 4
Get it as soon as Friday, Apr 4
Get it as soon as Friday, Apr 4
Customer Ratings
4.04.0 out of 5 stars1,474
4.04.0 out of 5 stars1,665
4.24.2 out of 5 stars42
4.34.3 out of 5 stars146
4.44.4 out of 5 stars456
4.54.5 out of 5 stars5,899
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Ultra-Slim Ultra-Portable Ultra-Safe 2500mAh Wallet Pocket Power Card Power Bank, ONE-for-All External Mini Battery for Most Smart Phone and Digital Devices(White with Lightning Adapter)

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Product Description

Kolumb Wallet Power Bank

Kolumb power bank

Easy to Carry

Great Every Day Carry Item:

  • Slightly bigger than a credit card, size fits in almost any pocket and purse.
  • 2.11oz, nearly zero burden carry-on.

kolumb power bank

Easy to Use

One Device, Dual Compatibility:

  • No extra cables to keep up with or get tangled up.
  • The adapter helps extend the power bank's compatibility.
  • Slot for adapter's storage

kolumb power bank

Value Added Item

One to Go, not a dream:

  • Stick-on Phone Pocket included helps carry the Power Bank with your cell phone.
  • Cell phone, cards, coins, backup battery, all in one.

kolumb power bank

Always Within Reach

Emergency saver:

  • It is your backup power always within reach
  • It may not give your phone a complete charge, but it can keep your phone alive in an emergency till you can find a stable power supply.

Capacity 2500mAh; 9.25wh
Average Output 1750mAh; 8wh
Output Built-in Micro USB cord and adapter: 5V/ 1A
Input Micro USB: 5V/ 1A
Recharge Time 5V/ 1A: approximately 3 hours, 5V/ 2.1A: approximately 2 hours
Power Level Indicator Recharge: Red light flashing; flashing stops till the power bank fully recharged, Discharge: Blue light on and will be off when battery level down to zero.
Wallet Power Bank
Wallet Power Bank Plus
Buying Options
Buying Options
Customer Reviews
4.0 out of 5 stars 1,474
—
Battery Capacity 2500 mAh 4000 mAh
Adapter for iPhone ✓ ✓
Adapter for USB-C port ✓
Slot compatible for iPhone adapter ✓ ✓
Slot compatible for USB-C adapter ✓
Stick-on Phone Pocket ✓ ✓
kolumb power bank

Customer reviews

4 out of 5 stars
1,474 global ratings

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Customers say

Customers appreciate the power bank's compact size, comparing it to a fat credit card, and find it convenient to carry in pockets and purses. The battery life is positive, holding at least one full charge, and customers find it easy to use. The charging speed and functionality receive mixed reviews - while some report it charges phones up to 50% in 30 minutes, others say their phones never gain any charge, and while some say it works well, others report it doesn't work very long. The value for money and USB cable compatibility also get mixed feedback, with some finding it a great value while others say it's not worth the money, and while some appreciate the built-in cable, others note it's not USB-C compatible.

AI-generated from the text of customer reviews

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SizePocket sizeBattery lifeEase of useCharging speedFunctionalityUsb cableValue for money
190 customers mention "Size"171 positive19 negative

Customers appreciate the power bank's compact size, comparing it to a fat credit card, and note that it fits well with phones in any pocket.

"...This unit is a terrific size. I can charge the phone in my shirt breast pocket with the charger flat up against the phone; it is very slim...." Read more

"...The iPhone 7 battery is pretty good, and this paperweight device is all I need to make it last as needed for the game...." Read more

"...Pros: small, light weight, can fit any type of phone with the adapters, has the wire attached, great to keep in a small purse for emergency..." Read more

"I have the previous version of this and it was great; the small size and thin profile was super convenient, and it could charge my iPhone twice...." Read more

80 customers mention "Pocket size"80 positive0 negative

Customers appreciate the power bank's compact size, noting that it fits easily in any pocket and is perfect for keeping in a wallet.

"...It sits parallel to the phone so you can charge the phone while in your pocket. In short, this charger is indispensable. There is nothing like it...." Read more

"...So yes, I do keep it on me and is light weight and easy to carry...." Read more

"...type of phone with the adapters, has the wire attached, great to keep in a small purse for emergency charging..." Read more

"...(and ability to be stored in your wallet), so it definitely gets a five with those considerations...." Read more

44 customers mention "Battery life"44 positive0 negative

Customers like the power bank's battery life, as it holds at least one full charge and serves as a perfect backup.

"...The iPhone 7 battery is pretty good, and this paperweight device is all I need to make it last as needed for the game...." Read more

"...All in all, this is a great little backup battery. It is great when you need to finish listening to an audiobook on the Nano...." Read more

"...So does it last long charged I will have to post that info at a later time." Read more

"...This is the perfect backup battery because you can carry in your pocket every day without even noticing it...." Read more

44 customers mention "Ease of use"40 positive4 negative

Customers find the power bank easy to use and convenient, particularly noting that it fits well in their purse.

"...Its completely reliable, super easy and so well designed w/the cables built in - I literally rely on this without issue...." Read more

"...of this and it was great; the small size and thin profile was super convenient, and it could charge my iPhone twice...." Read more

"...I wouldn't use this as your main battery pack, but it makes a good emergency source that you can keep in your wallet in case of emergency...." Read more

"...best thing is that this charger can fit the OEM adapter so it’s really convenient and the pass through charging is a plus...." Read more

184 customers mention "Charging speed"89 positive95 negative

Customers have mixed experiences with the power bank's charging speed, with some reporting it charges phones from 2% to 50% in 30 minutes, while others mention their phones never gain any charge.

"...It is able to fully charge my Moto X. It fits in a back pocket and is so sturdy you can sit on it all day without damage...." Read more

"...at some point it will just stop so you have it plugged in but its not charging. Then other times it seems to work better, but never normal...." Read more

"...whole amp thing, but I have a 2 year old galaxy S7 and it charged my phone from 2% to 50% (I used it minimally during charging)...." Read more

"...I shared my experience with it not fully charging our phones and within 24 hours, I had a reply seeking more information and offering a refund if..." Read more

171 customers mention "Functionality"93 positive78 negative

Customers have mixed experiences with the power bank's functionality, with some reporting it works well and lasts a month, while others find it useless and say it doesn't work very long.

"...It is able to fully charge my Moto X. It fits in a back pocket and is so sturdy you can sit on it all day without damage...." Read more

"...I've now gone through 5 adapters. Update: These are a fail for iPhones, the last lighting adapter that comes with this battery has broken..." Read more

"...When it works, it works really well, and the design is really outstanding with the cables and adapter built in...." Read more

"It's small. It works. It didn't charge my small droid mini to 100%. It died. Now in a pinch it will definitely help you out...." Read more

61 customers mention "Usb cable"40 positive21 negative

Customers have mixed opinions about the power bank's USB features: while some appreciate the built-in micro USB cable, others note the lack of a regular USB output socket and USB-C adapter.

"...This one has the micro USB cable built in. However, it doesn't have an easy way to monitor the extent to which the battery is charged...." Read more

"...Its really a shame because the design is outstanding with the built in cables, and the company was great about mailing me a replacement for the..." Read more

"...The only thing I did like is the micro usb input but honestly it’s not that bad I just wish it were type c, and the included adapters for iPhone are..." Read more

"...light weight, can fit any type of phone with the adapters, has the wire attached, great to keep in a small purse for emergency charging..." Read more

60 customers mention "Value for money"33 positive27 negative

Customers have mixed opinions about the power bank's value for money, with some finding it a great value while others consider it not worth the price.

"...This is the perfect charger for $12. It charges my iPhone from 10 % to 90 %. And it gives my Apple Watch around 5 charges max...." Read more

"...If you bought a similar, cheap, junky, made in China device 15 or 20 years ago, it would have disappointed in performance and there's no way in..." Read more

"...Thus judging from the low cost, it is a product well worth trying especially if your phone can be directly plugged into the micro USB port...." Read more

"...I’m very disappointed in this product. Definitely a waste of money!" Read more

Best portable power bank (slim, lots of juice, and built in cable)
4 out of 5 stars
Best portable power bank (slim, lots of juice, and built in cable)
I love this little power bank. This is the slimmest power bank that gives me 90 % on a full charge. The only thing I did like is the micro usb input but honestly it’s not that bad I just wish it were type c, and the included adapters for iPhone are usable but I upgraded to the official apple adapter. The best thing is that this charger can fit the OEM adapter so it’s really convenient and the pass through charging is a plus. I use this power bank to charger my Apple Watch and iPhone ( SE 2020) when im not near a plug. This is the perfect charger for $12. It charges my iPhone from 10 % to 90 %. And it gives my Apple Watch around 5 charges max. Disclaimer: I use the Ifory Apple Watch charger adapter to charge my Apple Watch with this portable power bank if your looking for the best Apple Watch charger that’s the one to go for ;)
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Top reviews from the United States

  • Fred Fandango
    5.0 out of 5 stars Amazing Small Size. Micro USB Cable Built In. The Best Android Cell Phone Charger There Is!
    Reviewed in the United States on May 27, 2016
    Verified Purchase
    I originally rated this item 2 stars. I am now increasing it to 5 stars. I now can say that this is the absolute best cell phone charger I have ever found. Here is my original review:I was looking for a battery pack that matched the size of my Moto X cell phone and had a built-in USB cable. This unit is a terrific size. I can charge the phone in my shirt breast pocket with the charger flat up against the phone; it is very slim. The cable is long enough to wrap around and allow the two devices to lay flat together. With my old external battery I had to search for a USB cable -- a real irritation. This one has the micro USB cable built in. However, it doesn't have an easy way to monitor the extent to which the battery is charged. It would have received a higher score if there were a set of lights or a digital display that indicates the amount of remaining charge. There is a light on the battery but it isn't clear to me what the light indicates. I am also downgrading the device because it only charges my Moto X about half-way. Therefore, it is only useful for an emergency recharge.

    Here is why this review was wrong: The device charges extremely fast; much faster than plugging the phone into the wall. It is able to fully charge my Moto X. It fits in a back pocket and is so sturdy you can sit on it all day without damage. It sits parallel to the phone so you can charge the phone while in your pocket. In short, this charger is indispensable. There is nothing like it. Of course, there are many chargers that have more capacity. This one has enough capacity. And, it has the perfect form factor and sturdiness to carry in a pocket.
    12 people found this helpful
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  • R. Holland
    5.0 out of 5 stars Unusual and useful little battery.
    Reviewed in the United States on October 23, 2016
    Verified Purchase
    Updated Review:
    After 4 to 6 weeks of daily use.
    I've purchased 2 sets of 2each. 2 white and 2 black.
    The original 2 white ones are still working after 6 weeks. One of the black ones (3 weeks old) doesn't charge the phone, just keeps it at the same power level, so I am returning that on ed and buying another. I love these little things.
    Original Review:
    Very light weight. I am playing an cell phone game that is battery intensive - so I got this with the idea of keeping it in a pocket for probable use throughout the day. So yes, I do keep it on me and is light weight and easy to carry. The iPhone 7 battery is pretty good, and this paperweight device is all I need to make it last as needed for the game. I was sceptical at first, but am sold on it. I may order another. I had an idea to put double sided scotch tape on it to stick to the back of my phone. So the tape is on it, with a plastic sheet left over from a screensaver to protect the sticky side till I need it. I know this is a great idea lol.
    If it does'nt work out, I'll come back and tell you why.
    The size is just about the size of a credit card and is only as thick as the phone itself making it a very portable device. I had it connected for 45 minutes yesterday and it charged up the phone like a champ and had power left over.
    Edit: 2 weeks later and I have been using every day. This is great. I just bought 2 more for back up in case I damage one of the others. I would hate to mess one up and not have a spare. Did I say these were fantastic?
    I use scotch double edge tape and stick it to the back of my iPhone's lightweight case and have my battery problems vanish.
    Edit: I bought one of the larger batteries - although the same style - for my iPhone 6 plus. I am using the bigger phone to play my video game and the larger Battery works like a champ with the larger phone.
    11 people found this helpful
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  • vlad
    1.0 out of 5 stars Unreliable, doesn't work at all anymore. I would suggest to not buy
    Reviewed in the United States on January 31, 2018
    Verified Purchase
    I want to give it 5 stars, but sometimes it for some reason stops charging the phone even though the battery is fully charged. That's frustrating if you are charging your phone in your pocket, and come back and hour later and it stopped charging. And i've only used less than a dozen times.

    When it works, it works really well, and the design is really outstanding with the cables and adapter built in. Its not going to fit in a wallet (maybe a woman's wallet in a purse), but it fits into pockets really well.

    I'll come back in the future, hopefully it proves more reliable and I can give it a more experienced review.

    *** UPDATE***
    I've been using this daily and I've not experienced any of the issues I originally did. Its completely reliable, super easy and so well designed w/the cables built in - I literally rely on this without issue. Don't know what happened, but I can happily give this 5 stars. Again - no way in hell this is thin enough to fit in a men's wallet IMHO, but just very happy and totally recommend it.

    *** UPDATE 2 *** Well unfortunatley it seems my enthusiasm was pre-mature. This one is exhibiting the exact same issues as the first one I had. It will be fully charged, you plug it it into your phone, sometimes it works, sometimes it doesn't. Once you get it working, at some point it will just stop so you have it plugged in but its not charging. Then other times it seems to work better, but never normal. Its really a shame because the design is outstanding with the built in cables, and the company was great about mailing me a replacement for the first one that was busted. If they could make this reliable I would say this is a "must have" product, but unfortuantely I'm left around town with a dead phone!

    *** UPDATE 3 ***
    Doesn't work at all anymore - on either cable. Even though the company did send me a new one, which is a credit to them, I've now had two of these and unfortunately neither was reliable enough to use. I would advise you look elsewhere unless they release a more reliable version.
    47 people found this helpful
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