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Energio SLIM Portable Charger. 3850mAh External Battery Pack with Built-in Micro-USB cable for Samsung and other Android phones. Free Lightning Adapter included to charge iPhone 5 and 6. (Silver)

4.3 out of 5 stars 412 customer reviews
| 9 answered questions

Price: $19.95 & FREE Shipping on orders over $49. Details

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  • Sleek and sturdy light-weight aluminium shell with silver finish. Smaller than your cellphone  and so slim that it can fit in the same pocket with your phone. (4.21 x 2.64 x 0.33 inches, 3.8 ounces)
  • High grade lithium polymer battery gives a full charge on medium sized phones such the iPhone 6, Samsung Galaxy S6, LG Nexus 6. Over 500 cycles of charging.
  • Clutter-free charging with built-in micro-USB charging cable that is hidden away when not in use. No more messing with tangled cables.
  • Fast and safe charging with built-in software that regulates temperature, voltage and current. Maximum output of 5V/1.5A that gives a faster charge than other portable chargers of similar sizes.
  • Apple lightning adapter included to charge the latest Apple devices such as the iPhone 5 and 6 models. One Year Full Warranty that replaces all defective products with a new working battery charger.
1 used from $12.50
$19.95 & FREE Shipping on orders over $49. Details In Stock. Sold by Energio and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • Energio SLIM Portable Charger. 3850mAh External Battery Pack with Built-in Micro-USB cable for Samsung and other Android phones. Free Lightning Adapter included to charge iPhone 5 and 6. (Silver)
  • +
  • Vitamin C serum 22 by serumtologie® Anti Aging Moisturizer - 1.15 oz
Total price: $54.95
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Product Features

  • Size (LWH): 4.21 inches, 0.33 inches, 2.64 inches
  • Weight: 3.84 ounces
  • Battery Type: Lithium Polymer
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Product Description

Energio SLIM comes in a classy aluminium casing which is strong and sturdy integrating style and functionality in one neat package. With the dimensions of 4.21 x 2.64 x 0.33 inches, this portable phone charger is smaller than any cellphone, and it slips easily into the pocket of your skinny jeans without causing any unsightly bulge. Energio SLIM comes with a handy micro-USB charging cable built into it for hassle-charging. When not in use, the charging cable is neatly tucked in on top of the portable charger and is nicely hidden away. That means you don't have to mess around with charging cables that gets tangled up when you are in a hurry to charge your mobile devices. The Energio SLIM is installed with a propriety software that regulates temperature, voltage and current to give your mobile device the fastest charge possible in the safest way. It has a maximum output of 5V/1.5A that gives a faster charge than other portable chargers of similar sizes and battery capacity. Energio SLIM's 3850mAh battery is made of high grade lithium polymer giving you over 500 charge cycles in its lifespan. With Energio SLIM, you can enjoy fast charging in a small package. Energio SLIM are backed up with a one year full warranty. If your Energio SLIM is not working properly, we will replace your defective portable charger with a new working unit.

Product Information

Product Dimensions 4.2 x 0.3 x 2.6 inches
Item Weight 3.8 ounces
Shipping Weight 5.6 ounces (View shipping rates and policies)
ASIN B00LKDZZTW
Item model number A3
Batteries Lithium Metal batteries required.
Customer Reviews
4.3 out of 5 stars 412 customer reviews

4.3 out of 5 stars
Best Sellers Rank #174,243 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
#2,684 in Cell Phones & Accessories > Cell Phone Accessories > Batteries & Battery Packs > Portable Power Banks
#2,767 in Electronics > Portable Audio & Video > MP3 & MP4 Players & Accessories > MP3 & MP4 Player Accessories > Batteries & Battery Packs
#173,802 in Electronics > Cell Phones & Accessories

Warranty & Support

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

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
Hating the awkward look of lipstick-shaped chargers, I looked for a slimmer product and found these good reviews. This one is ultra-thin, sliding easily into a pocket, and is tough enough not to be crushed.

Energio originally sent me a USED model that was scratched and missing the iPhone adapter.
Although email is rarely efficient, I wrote to them and immediately received caring service. They followed up and within a few days they sent me a new replacement, even letting me keep the old one! (Which I gifted to a friend.)

Now that's good service! Not sure what happened originally, but I've had no issues with the replacement.

The only design flaw is for iPhone users, the Micro-USB to Lightning adapter must be carried loosely. It doesn't attach anywhere when not in use and there isn't a spot for storage. I wish Energio would incorporate a small place to attach the inch-long piece. I'm going to use Velcro to accomplish this myself.

Also, the cord from the body to the adapter is very fragile, but shouldn't be a problem if one is careful.

That said, the device holds more than one full charge and recharges at adequate speed; I've yet to test maximum capabilities but I'm impressed thus far.

At any time you can check how much power the device contains by pressing the side button, which illuminates corresponding blue LEDs.

The Energio Slim Portable Charger (creative name!) is perfect for travel, extended outings, or even if you're just too lazy to use a wall outlet. I am greatly enthralled with its quality and performance, as you will be too.
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Verified Purchase
not sure if I have a faulty device but when I first tried to charge it wasn't charging at all. The led would light up for a few seconds and shut off. I had to play around with it seeing if it was the USB port. I made sure it was the right voltage etc. I finally got it to charge but it won't charge my iPhone 5 until I do this weird sequence which is annoying. I have to put the adapter first into the device than press the button till it lights up and than plug the mini Usb into the adapter. Why do I have to go through that process all the time? Is it a design flaw or is my device just particularly different. I am constantly worried now that I may lose the adapter because you can't charge the device of the adapter is plugged to the mini usb. I tried to contact Energio but am not sure where.

Edit: Energio contacted me and was very apologetic of the possibly faulty device. They did everything in their power to resolve the issue. They sent me a new device but I havn't received it yet. Regardless costumer service is very important and they delivered. Kudos Energio.
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(+) On the positive side, the Energio is incredibly thin and pretty light. It is a great alternative to the “lipstick-style” chargers and the silver color matches the standard Macbook bodies.
(+) Performance: It took 4.5 hours to charge the Energio completely with the Kindle microUSB. (See below for explanation). Per the seller, that is the average even with their original microUSB
(+) How fast does it charge your device? Took an iPhone5 from 0% battery to 100% battery in about 115 minutes. That’s on par with a wall charger.
(+) How many charges of your phone per Energio charge? I’m averaging about 1.5 charges of an iPhone5 before needing to recharge the Energio.
(+) Easy to see when it’s fully charged: Small blue light on the side of the device flash as it’s charging. When all the blue lights are solid, you know it’s at 100%.
(+) Built-in cable and lightning adapter PRO: If you aren’t charging an Apple device you don’t need the lightning adapter – and the charging cable tucks (plugs) completely into the Energio.
(-) Built-in cable and lightning adapter CON: If you ARE charging an Apple device, you need the lightning adapter and you don’t want to keep removing the adapter (too easy to lose). This means you can’t tuck the charging cable into the Energio. The little flap of plastic that connects the microUSB/lightning adapter to the actual Energio seems like it could easily get bent or torn off. So I’m 50/50 on this one.

(-) The microUSB cable that came in the box (to charge the Energio) does not fit into the microUSB port on the device I received. Three emails with the seller did not resolve the issue. They first recommend I use a microUSB cable from another device (like a Kindle) to charge it.
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Verified Purchase
I have used two of these chargers now. The first one arrived DOA and was promptly replaced by the seller - he was great to work with and was very responsive - very good customer service! The second one I received however had a different problem. The little white charger gets stuck inside the aluminum body - eventually after I had so much trouble removing the charger end, the white tabs on the side of the charger end ripped off. It is now extremely difficult to get the charger out of the aluminum case to charge anything. I was also disappointed that I was unable to charge the battery pack and have my phone plugged into it. You essentially need two chargers to have simultaneous charging. I have a Samsung S3 whose battery is failing and this little unit would charge about 1.5 to 1.75 charges. The size is great and the aluminum case feels very nice, but I ended up getting a bigger battery pack that had a better charger design (Eoso 10000mah Ultra Slim Dual Port USB Fast Charging Portable Power Bank Built-in Micro USB Cable External Battery Charger Pack for Iphone Samsung Galaxy HTC Motorola Moto Android Smartphone Phone Ipad Tablets Pc (10000mah Black)).
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