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ROMOSS? Solo2 4000mAh Portable Charger External Battery Pack Power bank Power Supply Station Broad Compatibility, Fast Charging, High Capacity, Ultra Compact, for iPhone iPad Samsung HTC Motorola Nokia Nexus android cell phone and more

4.4 out of 5 stars 211 customer reviews
| 34 answered questions

Price: $7.99 & FREE Shipping on orders over $49. Details

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Sold by Mambate USA and Fulfilled by Amazon. Gift-wrap available.
Solo2 4000mAh
  • Fast shipping: ship from USA, arrive in 2-5 business days.
  • High Capacity: Grade A Cell Used to assure you a highest quality and reliability. 4000mAh, 500+ recharge cycles over the life of the battery.
  • Compact profile, sleek gloss exterior and intuitive design combine for comfortable palm-held use, 4 LEDs to indicate charge levels, enter power saving mode after 1 minutes.
  • Charging while Discharging: Special design allows charges the device while being charged, it saves your time.
  • Seven kinds of Protection: Input over-voltage protection, Output overvoltage protection, Input over-current protection, Output over-current protection, Short circuit protection, Over Power Protection, Over-temperature protection
2 new from $7.99
$7.99 & FREE Shipping on orders over $49. Details In Stock. Sold by Mambate USA and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • ROMOSS? Solo2 4000mAh Portable Charger External Battery Pack Power bank Power Supply Station Broad Compatibility, Fast Charging, High Capacity, Ultra Compact, for iPhone iPad Samsung HTC Motorola Nokia Nexus android cell phone and more
  • +
  • ROMOSS? Solo3 6000mAh Dual USB Portable Charger External Battery Pack Power bank Power Supply Station,Broad Compatibility, Fast Charging, High Capacity, Ultra Compact, for iPhone iPad Samsung HTC Motorola Nokia Nexus android cell phone and more
Total price: $14.98
Buy the selected items together

Product Features

Size: Solo2 4000mAh
  • Size (LWH): 3.52 inches, 1.91 inches, 0.83 inches
  • Weight: 4.48 ounces
  See more technical details

Product Description

Size: Solo2 4000mAh

Newest ROMOSS external battery Power bank,compatible with almost smartphones and other USB devices.

It Compatible with:
-Apple iPhone 6/6 plus/5/5S/5C/4S/4/ iPad Air mini
-Samsung Star 2/Young 2/Ace 4/S5 Sport/S5 LTE-A/ Galaxy S5 mini/Avant/S5/S4/S3/S2, Note 3/4
-HTC Desire 516/One X S/Butterfly 2/Desire series...
-Motorola DROID MAXX/ Ultra/Mini/Moto X...
-Nokia X2/Lumia 530/930/1520/600/710/Icon/N8/ C6...
-LG G3s/G3/G2/Optimus 3d/2x/one...
-Google Nexus One/Nexus S..
-Sony Ericsson Xperia C3/Xperia Z2a/Z1/Z1 Compact/T3/M2/E1/X10 Mini Pro...
- Amazon Fire Phone/Kindle, Kindle Touch, Kindle Fire...
-Others Nook Color,MP4,MP3,Portable Wifi,PSP (NOT with 4.51ozs)

*It is very convenient to take it out

High Capacity&Long Lasting:
-Capacity: 4000mAh
-Type: Lithium ion (Li-Ion)
-Input Charging Time:5 hrs(using 1A AC adapter)~10 hrs(using 500mAh AC adapter or PC USB)
-Life Cycle>500 Times
-Input: DC5V 1A MAX
-Output:DC5V 1A MAX

Warranty policy:
-Warranty: All items are accompanied by one year factory warranty.
-Returns: All items are eligible for return within 30 days of delivery. Please contact us before return.

Box Contents:
-1x Solo2 4000mAh ROMOSS Battery Pack
-1x Romoss Micro USB charging/data cable(iPhone and iPad's cable is not included)
-1X User Manual

*Please Consult User Manual for More Information


Product Information

Size:Solo2 4000mAh
Product Dimensions 3.5 x 1.9 x 0.8 inches
Item Weight 4.5 ounces
Shipping Weight 12.8 ounces (View shipping rates and policies)
ASIN B00J1EO4IA
Customer Reviews
4.4 out of 5 stars 211 customer reviews

4.4 out of 5 stars
Best Sellers Rank #137,695 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
#2,182 in Cell Phones & Accessories > Cell Phone Accessories > Batteries & Battery Packs > Portable Power Banks
#2,248 in Electronics > Portable Audio & Video > MP3 & MP4 Players & Accessories > MP3 & MP4 Player Accessories > Batteries & Battery Packs
#137,319 in Electronics > Cell Phones & Accessories

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By JJCEO #1 HALL OF FAMETOP 10 REVIEWER on March 9, 2013
Size: Sailing 2 5200mah
Length: 8:32 Mins
This is one of the most stylish and nicest battery packs that I have had the opportunity to review. It is a great product for anyone who travels or works long days. This powerful battery pack can charge your smart phone or extend the use of your smart tablet. It is beautifully designed, small and portable. It weighs in at 4 and ¼ ounces. It uses two top of the line Samsung 18650 power cells which will provide years of recharging capability, up to 500+ times. These are the same style of batteries used in many portable computer battery packs.

What I like is that the unit is priced well and it is so small and portable but can really carry a lot of power. It easily fits into your purse, briefcase, computer bag or pocket. You could recharge most smart phones from 2 and up to 3 times with this power cell. I have included a video of this review and I hope it is helpful to you.

The output current to charge your devices is limited to 1 Amp. Please remember that after you connect your device to press the battery pack's "On" button one time to start the charging. Make sure to take note that your electronic device indicates that it is charging. This battery pack does have one feature that is not normally available on battery packs. You can plug in your phone into the battery pack and charge it and at the same time plug in the battery pack to a charging source and charge the battery pack while it is charging your electronic device. I recommend that you use an AC powered USB wall charger with an output current of 1.5 to 2.1 Amps to charge the battery pack. The battery pack can charge at 1.5 Amps and this will allow your battery pack to charge while it charges your smart phone.
Read more ›
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Size: Sailing 2 5200mah
Length: 3:42 Mins
The Romoss Sofun2, model PH20 is an excellent 5200mAh battery pack. It provides 5V output at 1A and uses high quality Samsung cells.

The batery pack is a matte white finish that I really like. The color makes is much easier to see when it's stashed away somewhere. The matte finish means it's basically fingerprint proof.

A USB to microUSB cable is provided. The cable length is 7.25".

The Romoss Sofun2 PH20 has a built-in LED flashlight capable of 250 hour run-time with fully charged batteries. The flashlight turns on and off with a quick double-press of the on/off button.

The same on/off button allows you to check the battery charge level indicated by 4 LED"s. The battery pack will auto-shutdown after 3 minutes of inactivity. That's an important feature that not all battery packs have and ensures that your battery power doesn't slowly drain away because you forgot to turn it off.

The battery pack can be charged from the USB bus of your computer or from an AC charger with USB output. It is possible to have a device attached to the battery pack at the same time the battery pack is being charged. Not all battery packs allow this and it's a great feature.

Capacity: 5200mAh
Output: DC5V, 1A max
Weight: 4.1 oz
Size: 3.52" x 1.90" x .82"

This is my new favorite battery pack due to it's attractive design, great features and compact size.

I was provided a sample for review.
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Size: Sailing 2 5200mah Verified Purchase
This worked great for the first few charges. Then it got into a weird mode where charge indicator leds stayed on all the time. I contacted the company, but my inquiry went unanswered for a full week. I logged a complaint with Amazon. Only then did seller reply to my complaint. Then, they requested I send them digital pictures of the failure. Uh, WHY? (Failure could have been simulated by a single button push and then taking a picture before led timed out).They also said they wouldn't reply for up to ten days because of chinese new year. Well that wouldn't have been a problem if they had responded right away. Basically they seemed to be just putting me off.
In the meantime I just set it aside until it drained itself all the way. This reset the problem and it hasn't returned. The seller never got back to me asking why I never sent them pictures.
Since then I ordered another with twice the capacity for the same price. The "Winnovo Power Bank" unit is a far better value for the same price.
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Size: Sailing 2 5200mah Verified Purchase
First off, I got the item in 3 days from the day I ordered it. There is something wrong with what Amazon has for their standard shipping. It wasn't due to me for another 14-21 business days. Don't get confused. Email the seller. If they say it is here in the US, then you will get it in a few days. Ignore what Amazon has for it expected delivery date.

It came to me fully charged and it charged my Galaxy S3 very fast. But it only needed a little charge when I first used it. I will use it for real tomorrow night on a boat ride where I know I will need it to charge my phone. I will post my final review later this weekend. Like everyone says, READ the manual. Don't guess on how it works. It is very simple.

Update 9/3/13: OK I used it on Sat night when I was away from DC current for 6 hours. It charged my phone from 50-100% very fast, in 90 mins. The secret to all of these chargers is to not use them unless you really need to. They have a limited number of charges. Most of the time I am near a car charger or an outlet at home or at work. I will only use this when I know I won't be able to charge it at home or in the car for more than 3 hours. I still give this 5 stars and its worth what I paid!
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