
I think many of us are familiar with such a situation, when suddenly you find out that your phone or Internet tablet is about to be depleted, and this happens, unfortunately, at the most inappropriate moment for this.
What to do if you need to recharge the battery, for example, sitting at a seminar away from the outlet, at a picnic away from the on-board network of the car, where there is no possibility to stick the usual 220V charging?
Having experienced on myself when a discharged battery destroys all plans, in this article I want to tell you about the external batteries that I liked most and are capable of helping out in such situations.
Since I need a universal device, I will not consider those external batteries that are “sharpened” for a specific phone, I will not consider charging a manual-driven dynamo, I will not consider overall and heavy devices, I will not consider low-efficiency devices solar powered.
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What I need? Compact and universal device with built-in USB connector, with which I can easily charge my phone, tablet, etc.
Consider the model of external batteries, which, in my opinion, deserve attention.
Model called "
Mophie Juice Pack Powerstation "

This is a development company Mophie, which can charge almost any existing USB-devices, including all versions of the iPhone, iPad and iPod.
Apple-certified universal battery is designed using innovative technology that provides ultra-fast charging of all iPhone, iPad and iPod modifications.
Powerstation has a 4000 mAh lithium-ion battery, which provides a very high charging speed, can change the current level from 1A to 2.1A, depending on which gadget you charge, provides reliable protection against short circuit, overload and overheating.
It has a stylish appearance, ultra-compact design, six LED status indicators.
Dimensions: 7.3 x 10.9 x 1.65 cm.
Weight: 289 g
Estimated cost:
$ 80The next model is called "
Philips Power2Go "

The Philips battery pack is a portable power station for recharging all portable electronic devices. Up to 60 hours of backup power from the device, no larger than an external hard drive. The battery pack is suitable for charging all portable devices, including laptops. There is a charge level indicator.
Thanks to the complete interchangeable plugs for connecting, the device is compatible with most portable devices from a wide range of manufacturers. Simply select the plug that fits your device.
After charging is complete, the power supply to the batteries of the portable device is terminated using a protection circuit.
Voltage: 5.6 V DC, max. 350 mA, 19 V, max. 2000 mA Battery capacity: 1000 mAh (at 19 V), 3600 mA * h (at 5.6 V). Battery Type: Lithium Polymer
Dimensions: 8.1 x 12 x 2.5 cm
Weight: 282 g
Estimated cost:
$ 80The next model in the line of batteries - "
Energizer XP4001A "

A new solution for iPad, Samsung Galaxy Tab and other tablets, smartphones and digital video cameras.
The key advantage of the Energizer external battery is that it makes mobile device use even more mobile.
Patented Powersafe ™ technology, no disruption concern - charge 2 USD devices at the same time!
Two 5V USB outputs Recharge - up to 500 cycles
Intelligent LED indicator Rubber pads - the device does not slip in your hand
Auto power off when fully charged Compactness - fits in your hand
Certified Data cable for iPad / iPhone, adapter for charging tablets Samsung Galaxy Tab
Battery cell: Lithium Polymer, Capacity: 4000 mAh @ 5V
Input voltage: 5V, Max 1500 mA, Output voltage: For tablets - 5V, Max 1500 mA,
For phones - 5V, Max 500 mA, charge time: ~ 4 hours
Dimensions: 11.4 x 7.4 x 1.6 cm
Weight: 139 g
Estimated cost:
$ 90The next model in the battery line is “
Power Bank ”

On this model there are two standard USB outputs, and one input for Mini-USB / DC-3,5. The main advantage of two USB-outputs is the ability to simultaneously charge two mobile phones! That is, for example, you can charge not only your phone, but also help out a friend who can also charge your mobile phone from Power Bank iPad / iPhone along with you.
Power Bank is powered by a Li-pol battery. Included with the UMB are the following adapters: Apple, Sony Ericsson, LG, Samsung-2 pcs., Nokia, Mini-USB, Micro-USB, as well as cable extenders Mini-USB / USB and Mini-USB / DC-3,5 .
There is no power supply for recharging the device itself. UMB can be recharged using a standard USB / Mini-USB cable from a computer or laptop. Capacity is 5000 mAh.
Dimensions: - 11 x 7 x 1.6 cm
Weight: 145 g
Estimated cost:
$ 70The next model in the line of external batteries - "
Yoobao YB-642 "

Yoobao YB-642 has a stylish design, and the device comes with many interchangeable plugs that you can use as a charger for other mobile devices.
The YB-642 mobile battery connects to a standard power outlet and is equipped with two USB ports for charging mobile devices. This ultra-portable case contains one of the most powerful portable chargers in its class. The 11200 mAh Lithium-polymer battery will provide you with uninterrupted battery life for making calls, typing and playing games. Ideal for everyone: from mobile phones to handheld game consoles.
Size: 120 x 75 x 25mm
Weight: 250 g
Estimated cost:
$ 95And, the final model of my review today is "
Capdase Power Cruiser Battery Pack "

The huge capacity of 18000 mAh rechargeable battery, which charges and powers up to 3 devices simultaneously (maximum 60W) designed to increase the operating time of your mobile device. The battery can be used with laptops, tablets, smartphones, multi-media players, game consoles.
The front panel of the battery has an LCD display that displays information about the operation and condition of the device.
Automatically changes and controls the output voltage and voltage while charging the laptop
Includes replaceable nozzles for connecting to laptops with voltages of 15-20 V
For use with most laptops, tablets, smartphones, Apple iPhone, iPad and iPod
An interesting device in my opinion, but an obvious disadvantage in comparison with previous models is the weight and dimensions and price.
USB: 15W, USB 1: DC 5V, 2000 mA, USB 2: DC 5V, 1000 mA, DC 15-20V, 3000 mA (max)
Size: 19.3 x 11.5 x 2.8 cm.
Weight: 590 g.
Estimated cost:
$ 300Which of the devices is more convenient for you - decide for yourself. The main thing is that you would not be left without energy at the right moment.
This review does not claim to be complete, I just want to help colleagues a little in choosing. I hope that this information will be useful.
Thanks for attention.