Reviews of Best external battery for android phone users

Firstly,I want to say that buying an external battery for android phones is necessary,but sometimes it's difficult to buy a great external battery.Because there are many brand external batteries and lots of manufacturers,you never know how does the external battery work,and how to choose a best external battery,just as the article I wrote"Four Important Aspects to Choose a Great EXxternal Battery".Capacity,portability,versatility,affordability,the four aspects is indeed vital,anyway,it's hard to say for buyers to judge whether is better.

The following I would like to recommend is my favor,RAVPower Dynamo-On-the-Go RP-PB03 5600mAh External Battery Pack and Charger.And this brand product has received many good reviews,the following is one of customer's review,hope can give some people some suggesttions to know about this products:
This is a perfect 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 uses two top of the line Samsung 18650 power cells which will provide years of recharging capability. 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. 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.

Please note that the unit comes with two cables and you can charge the battery with your PC or with the wall AC adapter. The wall adapter will charge the battery pack twice as fast at 1 Ampere DC because your computer's USB port is limited to 500 mADC. The charging port requires a USB micro-B connector that comes with the unit.

The output current to charge your devices is limited to 1 Ampere but it still was able to charge my iPad 2 and iPad 3 which normally charges at 2.1 Amperes. Please remember that after you connect your device to press the power pack's "On" button one time to start the charging. Make sure to take note that your electronic device indicates that it is charging. The blue LEDs on the front that flash when the unit is charging or stay on to indicate the battery charge level are very bright. I had to cover them up at night as to not light up the ceiling of the bedroom, especially when they were flashing. (Very distracting)

Here are the product features:
* 5600 mAh capacity
* Compact and portable weighing in at only 4.36 ounces
* Highly attractive design
* Output is 5.3 VDC at 1 ampere
* It comes with its own AC wall charger
* The wall charger is rated at 5.3 VDC and 1 Ampere
* It has 4 LED status lights that indicates the battery charge level.
* Built in bright LED flashlight that will operate for 250 hours when the unit is fully charged.

Included accessories:
* AC wall charger
* A nice velour bag to carry the charger in
* 7 adapter connectors for most phones
* 2 USB cables 7 ¼ inch and 28 ½ inch in length
* Instruction manual
* 1 year warranty
* What is not included is a USB to Apple cable for charging so make sure to use your original cable from Apple.

Performance while charging two iPhone 4's:
* Phone 1 Started 42%. Battery 4 LEDs
* 15 minutes 59%. Battery 4 LEDs
* 30 minutes 75% battery 4 LEDs
* 45 minutes 87% battery 4 LEDs
* 60 minutes 93% battery 4 LEDs
* 75 minutes 97% battery 4 LEDs
* 90 minutes 100 % battery 4 LEDs

* Phone 2 Started 52%. Battery 4 LEDs
* Started at bed time and charged. When I woke up the phone was at 100% and the battery pack had two LEDs lit.

Limitations on device charging:

* iPhone 4 battery 1,420 mAh battery capacity
* iPhone 4S battery 1,432 mAh battery capacity
* iPad 2 battery 6,944 mAh battery capacity
* iPad 3 battery 11,560 mAh battery capacity
* Kindle Fire battery 4400 mAh capacity
* Kindle Keyboard battery 1750 mAH capacity

* As you can see the Power pack will not fully charge an iPad because it only contains 5600 mAh of capacity. It will add to your usage time and my suggestion is to turn off the iPad while charging or start charging very early and use the RAVPower battery first while saving as much of your iPad battery as possible.

This is an outstanding product and it will be a hit with people who travel or work long days and use their phone or electronic tablet alot. It is an excellent buy and it performs extremely well. I recommend it as a 5 star product.

This review can reflect the true using procedure and factual situation,really can give buyers the right advice.Thanks this writters.I also bought one after reading this review.Now I just want to share this review to all of you.If you want to see the original review of this,the following is the address:http://www.amazon.com/RAVPower-Dynamo-On-RP-PB03-External-flashlight/product-reviews/B006ZTMEZ4/ref=dp_db_cm_cr_acr_txt?ie=UTF8&showViewpoints=1