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Lepow U-Stone Series 12000mAh External Battery Pack, Power Bank & Portable Charger for iPhone 6 Plus, 6, 5, 4, iPad Air, iPad Mini, Samsung Galaxy S6, S5, and other Smart Devices --Grey

4.4 out of 5 stars 321 customer reviews
| 34 answered questions

Price: $79.99
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Stone Gray
  • Red Dot Award Winner for its unique and timeless design
  • Faster recharging speed of 2.1A for a quick 7 hour charge (please use a 2.1A wall charger)
  • Great energy conversion - higher than 85% for better efficiency
  • Biodegradable packaging made from recycled materials
  • U-Stone Package includes the Lepow U-Stone, Micro USB flat cable, and user manual. Apple adapters-30 pin, lightening and wall charger not included.
3 used from $20.00
$31.99 & FREE Shipping on orders over $49. Details Only 1 left in stock. Sold by Lepow Official and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • Lepow U-Stone Series 12000mAh External Battery Pack, Power Bank & Portable Charger for iPhone 6 Plus, 6, 5, 4, iPad Air, iPad Mini, Samsung Galaxy S6, S5, and other Smart Devices --Grey
  • +
  • Portable Wireless Speaker - Lepow Modre Portable Wireless Bluetooth Speaker with High Def Sound Connects with iPhone, iPad, Samsung, and More (Green)
Total price: $60.98
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Product Features

Color: Stone Gray
  • Size (LWH): 6.7 inches, 3.1 inches, 1 inches
  • Weight: 12.8 ounces
  • Battery Type: Lithium Polymer
  See more technical details

Product Description

Color: Stone Gray

Lepow U-Stone Series 12000mAh External Battery for iPhone 5, 5C, 5S, 4S, iPad 2, 4, Mini, Samsung Galaxy S4, S3, Note 2, 3 - Retail Packaging - Stone Gray

How does Lepow stand apart From the Herd?

Lepow prides itself on being a creative and innovative company that is always going beyond the industry's standards. We consider not only how the product works, but how it can fit to a user's lifestyle and change the perception people have of electronics. Lastly, we create to make life more enjoyable each and everyday.

Red Dot Design Award Winner

2013 Red Dot Design award winner: high-performing, visually stunning mobile power bank. Stylish, rounded and unibody form allow easy access in and out of bags. Its smooth, uniquely textured exterior is quality you can truly feel. Legitimate 12,000mAh battery capacity. - iPhone 5, 5S, 5C ~ 7 times; - iPad Air ~ 1.5 times; - Samsung Galaxy S4 ~ 4 times; - Samsung Note 3 ~ 3 times.

What makes Lepow stand out even more?

1. Fast recharging speed 2. High conversion rate 3. High capacity of 12,000mAh 4. Lithium polymer battery 5. Shakable battery life display 6. Creative and recyclable packaging 7. Lastly, our customer service, like our products, is great! We provide a worry-free 12-month warranty and (exclusive to products sold by Lepow) and 100% satisfaction is guaranteed for every customer. Lepow is the only authorized seller for all Lepow products on Amazon.


What makes the U-Stone feel more fun?

U-Stone features a shakable battery life display. We want to make it easier and fun for you to check your battery life. Simply shake the battery front and back in a 90-degree motion. 4 blue LED lights will light up to indicate battery life. The LED lights are bright and sharp for aesthetic and visual purposes to match the product. It’s also very convenient especially if you’re carrying so many things; it is hard to reach a button when your hands are not free, but easy to just shake it.

Why people like this “big” portable battery?

“Big” means High Capacity. The 12,000mAh battery is perfect for long travels. With a capacity of “big” size, it can charge an iPhone 5 around 7 times. You can go travel and not worry about having enough power in your phone to take pictures or videos. We wouldn’t want you to miss out on creating memories. “Big” doesn't means inconvenient. The design of U-stone is not only good for its looks, but also for its convenience of use. The “U” shape design make you holding the battery more easier and being free to slide into your pocket. It will let you forget this is a “big” portable battery.

Why it is very important for a 50% reduction in charging time (With 2.1A Wall Charger) and high conversion rate?

With an input of 2.1A, the U-Stone is faster than many of the batteries out there. By using a 2.1A wall charger, the U-Stone can quickly charge up in 7 hours which is faster than most which would take 12-13 hours to charge fully. It means that you recharge your U-stone after you get back home and then you can take a full charged one next morning after a night’s sleep. It saves you a lot of time! The Lepow U-Stone features a higher conversion rate which means there is less battery discharge. That means you can charge your phone more. Many batteries only have an efficiency of 70%, but we wanted to set the bar by improving our conversion rates in our batteries. We know that in an emergency, every bit of power matters and we want to make sure you’re able to use the U-Stone to the fullest.

Why is safety the most important thing for an external battery?

The U-Stone uses a safe, high quality lithium polymer battery, which is safer and better than a lithium ion that many other batteries use. The smart circuit in the U-Stone protects against overcharge, over discharge, and overload. With an intelligent circuit, the U-Stone is able to correct the speed of the output to match that of the smartphone to ensure a safe charge with maximum speed. Once the device is fully charged, the U-Stone will stop the battery flow to prevent it from overcharging the device and ruining the device’s battery. The U-Stone also uses double layer protection to prevent overheating of the product. Lepow has also designed the battery layout to dissipate heat more efficiently for safe use.

Creative and Recyclable Packaging

The shape of the packaging is unique in that it looks like an oval dinosaur egg. It will definitely come as a surprise that inside the dinosaur egg is a battery. It’s not only for looks, but the structure ensures that the product will not get damaged during transit. The packaging on the Lepow U-Stone features biodegradable packaging made from recycled materials. We didn’t want to contribute to the Earth’s waste more than we have to, so we created this special packaging. If the packaging is burned, the byproduct is carbon dioxide and water; it is better than using packaging made from raw materials.

Why did the U-Stone win Red Dot Design Award?

The Red Dot Design Award is given to the best products that embody both style and functionality. The visually stunning U-Stone embodies all the ideals of Lepow: quality, innovation, creativity, and enjoyment. The seamless design makes the U-Stone stand out amongst others for its complex construction. The product also features a unique texture that feels like smooth white sand and a unique curved body for easy grip. The U-Stone’s unique soft smooth stone-like surface gives the product texture and makes it easy to find in a bag. The U-Stone features thin edges for a comfortable, ergonomic grip. The micro USB cable is tucked away in a small slot for convenience when travelling and to prevent loose and tangled cables.


Product Information

Color:Stone Gray
Product Dimensions 6.7 x 3.1 x 1 inches
Item Weight 12.8 ounces
Shipping Weight 1.1 pounds (View shipping rates and policies)
ASIN B00E3GXJDC
Item model number L-US12000-Gray-01
Batteries 1 Lithium ion batteries required. (included)
Customer Reviews
4.4 out of 5 stars 321 customer reviews

4.4 out of 5 stars
Best Sellers Rank #142,489 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
#2,249 in Cell Phones & Accessories > Cell Phone Accessories > Batteries & Battery Packs > Portable Power Banks
#2,318 in Electronics > Portable Audio & Video > MP3 & MP4 Players & Accessories > MP3 & MP4 Player Accessories > Batteries & Battery Packs
#142,102 in Electronics > Cell Phones & Accessories
Discontinued by manufacturer Yes

Technical Specification

Warranty [pdf ]

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]

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Customer Reviews

Top Customer Reviews

By JJCEO #1 HALL OF FAMETOP 10 REVIEWER on October 31, 2013
Color: Brown
Length: 6:23 Mins
This battery pack is nicely packaged in a light brown textured case. It is a powerful battery pack rated at 12000 mAh of capacity and the test results were good! I put together a video of the unit and the test results for your review.

The battery weighs in at 11 3/8 ounces. The battery pack has one USB output port that outputs 5 VDC at 1.8 Amps. During the testing the temperature of the battery pack never even exceeded ambient room temperature. To start your smart device charging you connect it with the proper cable and shake the battery to start the charging. To check the battery pack charge status you have to shake the battery and the LEDs on the front light up to indicate the battery's charged capacity. I had difficulty getting the battery to light up the LEDs and you can see this in the video.

This product has very good test results but I rate it at 3 stars. This large capacity battery has only one USB output port instead of the typical 2 or maybe even more output ports. In addition this port is rated at 1.8 Amps output and most batteries of this capacity have a 2.1 Amp port and a 1 Amp port. This battery can only output 1.8 amps at a time and comparable batteries allow you to charge two devices simultaneously with a 3.1 Amp output max. In addition this battery is well over 2 times the price of comparable top quality batteries. The test results were excellent with a capacity efficiency of 80 percent but the price and number and rating of the output port hurt this battery's rating. If the price of this battery were comparable to the other batteries in this class then the rating would have been a 4 star.

You should note that I did not operate my tablets or phones while I charged it but the WIFI and phone transmitter were left on.
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Color: Stone Gray Verified Purchase
I bought Lepow and another external battery for myself as the necessaries I prepared for my 7 days Kilimojaro trip. I love this product very much because of its beautiful design, high quality, and easy-to-carry especially comparing the other power bank.

1. I was amazed by the designer when I first open the shipping box. Firstly, I can tell people must spend much time on the package. Except Apple product, Lepow was the second company that gave me the feeling like opening a gift. Everything in the package was extremely well organized and carefully designed. Second, when I hold it in my hand, I love the stone like skin it has. Last but not least, it looks simple. It is portable. Cell phone shape makes it easy to put in the cell phone slot in the bags. It has the right color, and giving me the right feeling. Thus I like it.

2. Let me talk about the quality. The quality of an external battery should definitely refer to the length of power it can give to e products. Later when I was in the mountain of Kilimanjaro, the product impressed me again. My boyfriend and I both were not marathon people, so we chose the longest trek and hope to successfully make to the top. Since the trek last long, we got more rest time than other people. We brought two iPhone, one iPad, one Amazon fire, and one Sumsung Galaxy Note II as well as two external power banks with us. I selected Lepow because it looked nicer. And my boyfriend used the other external battery. Since I was a gamer, I believed and observed that I used it more frequently than he did. But his other external battery went out of power on the fourth day, but Lepow accompanied me to the last day.

My boyfriend and I made it to the top.
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Color: Stone Gray Verified Purchase
I got the Lepow U-Stone after investigating the price and actual capacity of all the other 12000mAh batteries on the market. I received a significant discount on the item when I bought it due to a special promotion. I've owned other external batteries in the past and find them extremely handy, using them quite often for charging my phone (LG G2) and tablet (Samsung Galaxy Tab 3) on the go. When I bought it, I had one other battery in my bag, a 2000mAh Romoss that is nice but doesn't have enough capacity. So how about the Lepow?

Starting with its much-hailed aesthetics, it does look good, but don't make any mistake, it's big, about the size of a graphing calculator and a little heavier, and somewhat of an awkward shape. The rough 'stone' texturing catches and shows dirt. The miniature USB cord in the top is a nice, conveniently placed, and a stylish feature. Unfortunately, it only has one USB port, which is, I think, the product's biggest flaw, considering its size. Lepow's smaller Moonstone line has dual USB ports; why does the U-Stone only have one considering its capacity?

The battery itself recharges at a reasonable pace. Use a wall adapter vice a computer USB port. It takes standard micro usb. I use a Samsung-model cell phone charger.

The capacity and the speed at which it charges devices are what redeem it as valuable, really; it actually does appear to hold 12000mAh and will happily and quickly charge up my phone with plenty of juice left for two rounds with my tablet, or several with my 3DS. I do pack and use it fairly often. Still, one USB port ensures that it's not the only external battery I carry with me regularly. if I hadn't gotten a discount on it, I probably would have bought the 13000mAh Romoss Sofun 4 for the same price as the U-Stone, or even perhaps two of the Lepow Moonstones instead, but I don't regret buying the U-Stone, either.
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