Don’t buy external battery before you read this!

As we have more and more gadgets, we are expecting our gadgets can always work when we need them. Our gadgets can do almost everything — until they run out of fuel. Times when you need to make that important call, send out an urgent e-mail, or need to use the apps on your device – but alas there is no battery…we’ve all been there and know first-hand the stress of being offline when you need to get things done!


External battery is indispensable for our smart life,but how much do you know about the external battery? Is your external battery really charge your gadget or make the damages to your battery of gadgets?

1) What’s external battery?

External battery serve as an ‘extra battery’ or external charger for your phone or other electronic devices.

2) Where is external battery made from?

Majority of the external batterys in the market are actually made in China. And the battery cell or PCB modules are from different countries.

3) How do I charge the external battery?

You can charge your external battery via the charger that came with your phone, computer usb port or using other external battery

 4) How long do I need to charge the external battery?

It’s depending on the REAL CAPACITY of the external battery. The larger REAL CAPACITY, the longer charging time may required. Different charging methods may result different charging time as well. Charging with the original charger will be faster than charging with computer usb port.

 5) Why sometime I need longer time to charge the same external battery?

Even though using the same charging method, the charging time may be differ due to environment,temperature, power flow and etc

 6) What is mAh?

mAh mean milli Ampere Hour, the capacity of the external battery is measure with mAh

 7) A 12000mAh REAL CAPACITY external battery, able to charge a 1500mAh capacity phone for 8 times full?

This is a common mistake make by most of the people. For rough calculation of the total charge time, kindly use this formula
REAL CAPACITY * conversion rate * phone battery health / phone capacity = total charge times
EXAMPLE: 12000 x 0.8 x 0.8 / 1500 = 5.12 charge times (0.5-1 times plus minus)

 8) What’s conversation rate?

Conversation rate is the remaining percentage of the battery after the battery lost in heat or PCB operation.

 9) What’s phone battery health?

In simple, it’s mean how‘healthy’ your phone battery is. Phone battery storage capacity will be lower and lower. That’s also the reason why our phone can last longer when it’s newly bought than after 3-6 months we used it. Different mobile phone models also will affect the calculation as some phone drain battery faster than the other.

 10) What’s PCB?

PCB means Printed Circuit Board,its control all the operation flow inside the external battery. A good quality PCB will allow the external battery to charge more and have better durability

 11) What’s the different between 18650 and Li-Polymer in the external battery?

– 18650 size and dimension are fix. Li-Polymer size and dimension are flexible.

– 18650 produce more heat. Li-Polymer are much more safer

– 18650 are cheaper. Li-Polymer are more expensive

– 18650 have higher self discharge rate.Li-Polymer have a very low self discharge rate

– 18650 battery durability will drop faster.  Li-Polymer battery capacity are more durable

12) What’s the common REAL CAPACITY in 18650 external battery in the market?

– External battery using 1pcs 18650 is 1200mAh – 2600mAh

– External battery using 2pcs 18650 is 2500mAh – 4400mAh

– External battery using 3pcs 18650 is 3750mAh – 6600mAh

– External battery using 4pcs 18650 is 5200mAh – 8800mAh

– External battery using 5pcs 18650 is 6500mAh –11000mAh

– External battery using 6pcs 18650 is 7800mAh –13200mAh

– External battery using 7pcs 18650 (no info)

– External battery using 8pcs 18650 is 10400mAh –14400mAh

1 3) Is there any external battery use higher than 2200mAh per 18650?

Yes. There are, but it’s not common due to the expensive pricing.

 14) What’s the different between branded external battery and generic external battery?

Branded external battery mostly sell in REAL CAPACITY. Generic external battery mostly sell in MARKING CAPACITY. That’s the reason why you will never see any branded external battery (standard size) have anything as high as 30000mAh – 50000mAh. That’s also the reason why a good 12000-13000mAh external battery are able to charge more or about the same like the market 30000-50000mAh external battery. Most of the external battery sell on with low price are MARKING CAPACITY but not REAL CAPACITY. Those with higher price and long warranty(more than one year, some brands offer 18 month warranty, like Sony, KINKOO, Xstorm) are REAL CAPACITY and reliable.

 15)  Is it true branded external battery won’t explode and generic external battery will explode?

Anything to do with battery, will have chance to explode. No matter it’s branded external battery or generic external battery. But chances for both branded and generic external battery to explode are very low, except those cheap and poor quality 18650 battery. And the Li-Polymer is safer than 18650 battery, it’s easy to fit the high-temperature environment.


Li-ion Battery Vs. Li-polymer: Which Works Better For Your External Battery Charger

Just like a car’s fueltank and transmission, Li-ion or Li-polymer battery cell is the key of a portable charger and directly determines it’s good or not. But it has been know that most consumers cannot distinguish them and make a right buying decision, as they generally can not be reflected in the specification label. In this article we explore their basic relationship and differences.


The Lithium-ion Battery

The first commercialized lithium-ion battery began in 1991 under Sony Corporation and then quickly followed by other manufacturers. As its energy density, load characteristic, and discharge behavior are reasonably good.

Lithium-ion is a low maintenance battery, an advantage that most other chemistries cannot claim. There is no memory and no scheduled cycling is required to prolong the battery’s life. In addition, the self-discharge is less than half compared to nickel-cadmium, making lithium-ion well suited for modern fuel gauge applications.

Lithium-ion has its drawbacks. It is fragile and requires a protection circuit to maintain safe operation.The cell temperature is monitored to prevent temperature extremes. Aging is another problem and many manufacturers remain silent about this issue. The battery frequently fails after two or three years.

The most economical lithium-ion battery in terms of cost-to-energy ratio is the cylindrical 18650 (size is 18mm x 65.2mm). This cell is used for mobile computing and other applications that do not demand ultra-thin geometry, now available in more than 60% of the external battery charger that bulky and wrapped in metal case.

Main advantages: mature technology, wide range of applications, compact size.

Main disadvantages: about 300 times cycle life, low security, anti-overcharge poor, not suitable for high-rate charge and discharge.


The Lithium Polymer Battery

The Lithium-polymer differs from other battery systems in the type of electrolyte used. The original design, dating back to the 1970s, uses a solid (dry) polymer electrolyte that has a poor conductivity, and the battery must be heated to 50–60°C to enable current flow, so that it is unsuitable for portable applications. To compromise, some gelled electrolyte has been added. All Li-ion polymer cells today incorporate a micro porous separator with moisture. The correct term is “Lithium-ion polymer” (Li-polymer for short).

Then, what is the difference between a normal Li‑ion and Li‑polymer?

As far as the user is concerned, they both use identical cathode and anode material and contain a similar amount of electrolyte. Although the characteristics and performance of the two systems are alike, the gelled electrolyte of Li‑polymer becomes the catalyst that enhances the electrical conductivity. Li-polymer offers slightly higher specific energy and can be made thinner than conventional Li-ion, but the manufacturing cost increases by 10–30 percent. Despite the cost disadvantage, the market share of Li-polymer is growing.

Li-polymer cells also come in a flexible foil-type case (polymer laminate or pouch cell), while a standard Li-ion needs a rigid case that increases the weight by more than 20 percent. Furthermore, the Li-polymer battery can be made into any shape, fitting neatly into stylish cell phones and laptops to make them smaller, thinner and lighter, as well as Kinkoo Infinite One 8000mAh and Infinite Nova 10500 Portable External Battery Charger.   

Main advantages: Volume diversity, lightweight; the use of a very wide range, not an explosion, high safety factor.

Main disadvantage: about 500 times cycle life, higher prices, not suitable for high-rate charge and discharge.


How to choose a reliable external battery for your mobile devices on the go?

A lot of it depends on your personal requirements.  If you don’t carry too many devices when you travel, then you can buy a small and low capacity one just to charge your smart phone.  If you need to charge an iPad, tablet, etc., then you will need a one that has a higher capacity.

  1. Capacity – Determine Your Usage:

The main attribute associated to a external battery is its capacity.  This capacity is measured in milli Ampere Hour i.e. mAH. You can’t exactly calculate how many times a specific external battery can charge your device, but the rule of thumb is more mAH rating mean more capacity.

So if you have a phone with a 1500mAH battery, ideally a capacity of 1500mAH can fully charge it once.  And when you buy a portable external battery, make sure that it can charge the battery of a specific device i.e. its output voltage matches with the device you own, because if the output voltage of the charger is less than the device being charged, it won’t work. Of course, the reverse is true, if you have a charge with a larger output voltage than your device, you may be able get several charges.

Should you decide on buying a external batterykeep your own usage in mind.  To meet huge charging needs of consumers, 8000mAh and 10000mAh, (and higher mAh) units are also available.  There are chargers that can charge almost any type of device, from all types of companies(such as Sony, Kinkoo, Anker). This includes ipad, ipod, tablets, and mobile phones from Apple, Samsung and HTC. Sample Usage Guide…

  • 1500mAh battery : mobile phone – 1 full charge.
  • 5200mAh battery : mobile phone – 2 full charges. Tablet – approximately 50%.
  • 10000mAh battery : mobile phone – 4 full charges. Tablet – at least 100% full charge.

External batterys are available in almost all the countries at various prices and in varying sizes and specs.  Before purchasing you should make sure that they are not used.  Used cell phone battery chargers will be a waste of money as their life span is not much.

Life span can also be greatly reduced if it is kept in adverse environmental conditions for a long time. There are external batterys whose lifetime is reduced at temperatures more than 45 Celsius. However, at extreme temperatures such as over 70 Celsius there is a good probability that the battery will be completely damaged.

  1. Price & Quality:

Apart from battery strength, one other thing which can help you decide which external battery charger is best for you… is the price.  But you should not buy a portable external battery which either uses refurbished batteries or which doesn’t contain the basic features e.g. short circuit, over-charging protection.


  1. Portability:

Several reasons of buying a external battery are that it is portable and will charge your device.  You can buy cheap ones with big capacity, but they usually will not charge your gadgets properly, or break down on you.

If you are looking to buy a external cell phone battery charger, we really recommend not going for the cheapest option. This is one of times where you do indeed get what you pay for. A mid-range to upper range price will be a great option with no sacrifice on quality.

Because of the large number of personal devices that we now have such as iPhones, iPads, Ardroids, smart phones, some cameras, GPS, MP4, IPods and Bluetooth to name a few, it’s practically a necessity to have one if you want to make sure that you never run out of battery power on your device. There is nothing more frustrating than running out of battery.

Before I had a External battery, I was on a long drive, using Google Maps with my Android.  My car charger stopped working, so my cell phone battery died halfway through the 4 hour journey and I had to find my way without back home relying on stopping and asking for directions several times. After this experience I went out and picked up a 10500mAh charger and use it all the time.



What Can You Benefit from An External Battery Charger?

We need our smartphones to be functional at all times, so we know that there is nothing more frustrating than a low battery alert in the middle of a busy day. Luckly, technology has come up with portable external battery charger, a tool that charge our phones, tablets, players and other devices on the go as and when needed. Here is what it can do.

  1. Great when you don’t have any electricity or access to a plug. External battery charger is essential and especially acts as backup coming to rescue of those who love travelling and hiking.
  2. It is high powered and can charge very quickly but still provide your device with a full charge, sometimes even quartic or quintic or more depending on power capability.
  3. It attaches to a USB port and so can be re-charged through a laptop, or while in the car. This USB port also provides compatibility with any device as long as they have standard ends. Moreover, many external battery chargers come with more than one port so that you can charge multiple gadgets at a time.
  4. Add to the appeal. External battery charger is now available in many really cool or stylish designs. They are refined in looks and appeal to your style, your personality, your life.

Overall, external battery charger is definitely convenient. After all, we wouldn’t want to run out of battery. But of course, they are also not without their disadvantages that equally and neutrally need to be taken into consideration.

  1. For good quality external battery chargers that use advanced materials and treatments to charge your smartphone faster and safer, prices will be high.
  2. There are external battery chargers that are really heavy and bulky. The higher the capacity, the heavier they are.
  3. Portable external battery chargers are batteries themselves and will also need charging.

Sure, nothing is without both advantages and disadvantages and no matter how gigantic or minute one choice is, they should always be taken into consideration with an open and neutral mind. It is really the only way to avoid regret in the future. You should think whether the portable external battery charger is really necessary to you.