How to choose power bank for your phone and tablet?

By June 16, 2016

The Ultimate Buying Guide to Mobile Power Bank Designed for Use on the Go. 

Power Bank comes with different names, battery packs, portable chargers, fuel banks, pocket power cells and back-up charging devices to name just few. But whatever you call them, they all do the same thing: CHARGE YOUR PHONE OR TABLET WITHOUT NEEDING A POWER OUTLET.

Power Bank, comes in all shapes and sizes, smaller sizes for an essential smartphone boost in your pocket, or bigger sizes for multiple charges or to charge a tablet. 

Meanwhile, you’ll notice some power banks with cables included, or some with multiple ports to charge more than one device at a time. 

How to Choose Power Bank for Smartphone and Tablet

Q1: Why to choose power bank for your phone and tablet?

Mobile Devices like smartphones and tablets make life so much easier. That is , until they run our of battery power when there’s nowhere to plug in. Most Popular Emojis

Power Bank in Daily Life

Q2: What you will benefit while choosing a perfect power bank for your phone?

Well, a lightweight power bank you can carry anywhere. Simply charge it up at home, throw it in your bag or your pocket, and connect it to your phone whenever it needs a quick battery boost. You’ll never suffer from “low battery anxiety” again. Most Popular Emojis 

Portable Power Bank to Charge Up My Phone

Q3: How to choose power bank for your phone/tablet?

How to choose power bank for your phone and tablet? Surely, it could be easy for you as you could just follow these tips below one by one; while it would be a little hard as you have to read and check the tips carefully, covering up to eight aspects in total, the size/capacity of power bank, power output, number of USB ports, cables included, power input, safety, quality and certification. 

How to Choose Power Bank

Let’s start by choosing the size of your power bank.

This is not about which one will fit in your pocket or your purse. The size of the battery is about the power inside. Most power banks will feature a number on the front that tells you the number of mAh or “milliamp-hour”.

Common sizes range from 2,000mAh up to 10,000mAh or even 26,000mAh. Bigger numbers mean more power and more recharges for your smartphone, or charging for bigger devices that need more power, like a tablet. 

We’ve used smartphones and tablets to compare battery sizes, but most power banks will charge any device that charges via USB, such as a GoPro camera, Kindle reader or Bluetooth headset. Bigger devices that draw more power will need bigger batteries – more mAh – to charge them fully.

How to Choose mAh for Power Bank

Then, we should consider POWER OUTPUT, a key point that’s to ensure fast charging for your phone/tablet. 

Technically the standard USB port on your power bank will fit any standard USB cable. However, the amount of power it can provide may vary. 

Question: How many times can a Power Bank 20,000mAh fully charge your phone?

Power Bank Charging Speed

Thirdly, it falls on NUMBER OF USB PORTS, a mattter of how many devices you need to charge.

Generally, bigger batteries with more mAh, sometimes have more than one USB port. If so, that can be useful to charge two smartphones at the same time – maybe to give a battery boost to a friend. 

Or you can charge your smartphone and your GoPro at the same time.

Or your smartphone and your Bluetooth headset.

Or even a smartphone and a tablet, if you choose a battery with enough mAh to provide all that power.

With multiple ports, simultaneous charging is super-easy.

Power Bank for Mobile

Fourth: your power bank will come with a cable.

A cable to charge the battery: YES

Every power bank should come with one cable (usually a standrad USB to Micro-USB cable) to charge the power bank itself, which you use to connect the power bank input port (usually Micro-USB) to a standard USB wall charger.

A cable to charge your phone/tablet: MAYBE

If your phone or tablet connects via Micro-USB, you can use the supplied cable to charge it.

If your phone or tablet connects via a Lightning or USB-C connector, you will need to use an additional cable to charge it. Some power banks come with multiple cables and you could check the packaging to see what’s included.

Some power banks provide cables that are detachable, which makes it easy to switch between cables for your iPad, your Samsung phone, your Kindle or another device. 

Some have cables that’re hard-wired to the battery that they cannot be detached, making them easier to find in a low battery emergency, but may make them less versatile overall.

Some even have clever storage solution: a detachable cable you can switch out for other cable, plus a way to keep the cable close so it’s always close at hand. 

Mophie Power Bank Take Along A Power Bank While Travelling 

 Fifthly, it’s about charging the power bank itself. 

Unfortunately, no power bank has been invented that magically recharges itself when it’s empty. But on the whole, they are pretty simple to charge: plug the supplied cable into the input port on the power bank and a standard USB on the other end into a wall charger or other power source. 

Power Bank input ranges from 1Amp up to 2.4Amps (short for ampere and it’s a unit of current). Put simply, the bigger the input number, the faster it will recharge.

Some power banks have an LED indicator, which tells you how much power the power bank has left and on the other side will tell you when you need to recharge the battery. 

How to Charge Up Power Bank 20000mAh

What’s more? Here’s something about how to choose a safe power bank.

It’s easy to avoid counterfeit and dangerous ones by following these simple steps:

Register Your Device   some power banks require you to register your purchase, by providing the serial number either online or via a helpline. This is a good way to activate your returns policy and to ensure your product is not a counterfeit. 

Check the Warranty   manufacturer, country of origin and the type of battery may mean differences in the type or duration of the warranty. If you are unsure, check the small print on the package or the instructions provided. 

Power Bank Recreational Life

Something else? Surely. The Importance of Quality.

Safe power banks should have undergone the following testing.

Efficiency   more efficient power bank is, a lower operating temperature it will have, which wastes less energy for a longer life expectancy.

Over Current Protection   it prevents too much power going into the battery pack and the power going out to the connected equipment, protecting the delicate circuitry of both devices. 

Over Voltage Protection   it protects both the power bank and the connected device by keeping the voltage within recommended safety parameters to avoid damage. 

Over Discharge/Charge Protection   some power banks consistently monitor charge states to prevent this from happening.

Heat Tests at Extreme Temperatures   While using batteries in extreme temperatures isn’t advised anywhere. 

How to Choose Power Bank

Last but least, it’s CERTIFICATION.

These logos or marks, usually found on the packaging, will indicate that they have passed the necessary industry standard regulations, to comply with and achieve the following certifications.

Power Bank Certification for Safety

So, have you got a clear idea about how to choose power bank for your phone and tablet while reading through the passage?

Please feel free to comment below if you still have some questions or concerns on choosing a right power bank for your mobile devices. 

Comments (74)

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  1. Is it possible to have a 60000mAh capacity power bank? I realized the capacities indicated in the briefing had a maximum of 20000mAh capacity ,

    • Technically it’s possible to have a 60000mAh power bank as long as you can accept the huge size and high weight of it.

  2. I am not looking to charge my device per se. I want my iPad mini to run continuously for at least 8 hrs at a trade show that does not provide AC power. So I need the power bank to act as an external power supply, which I assume is doable. If so, what mAh should I use?

  3. Thaks for your information… Please suggest a good power bank for le eco 2.

  4. How much mAh in a powerbank would you recommend for a SONY Experia Z5 smartphone? Your reply would be much appreciated. Thank You! – Dem

    • Hi Dem, as for the 2900mAh non-removable battery capacity of SONY Experia Z5, I suggest you to choose a power bank generating 6000mAh to 10000mAh for a daily use, literally it depends on how heavy you use your phone, if you are a quite heavy user, I recommend EasyAcc 10000mAh Ultra-Slim Power Bank, it’s ultra portable and supports quick charge of Sony Experia Z5.

  5. Thank you, this is the explanation I was looking forward to convince myself. Recently bought a one plus 5 and suffered during travel for want of power. How much mAh would the device need to keep my mind free of using it with fear of loosing out on power?

    • Hello, according to the data sheet one plus 5 sports a battery with 3300 mAh, if you are a commuter or usually travel, I recommend you a power bank with 10000 mAh. Portability and durability would be the first concern, I strongly recommend EasyAcc slim 10000 mAh power bank, I think it will meet your need in many ways.

  6. Thanks for the info. that is very helpful

  7. This is really helpful! Thanks!

  8. Planning to buy a power bank for the 1st time and need some good advice.
    1. Need for charging up 2 mobile phones (Samsung & Willifox) + laptop
    2. How many MAH should I buy?
    3. Suggest a durable company power bank with multiple ports

    • Hi, first I need the name of your phones exactly to know the capacity of the batteries inside. Generally speaking, the overall battery capacity of 2 phones would not be larger than 10000 mAh, I suggest you to get a power bank with at least 10000 mAh to support 1 charge for 2 phones in a row. EasyAcc 10000 mAh slim power bank is a good choice.

  9. Thank you very much for the article, I’m about to grab a new power bank with multiple ports and bigger capacity 🙂

  10. How much mAh would need a Samsung galaxy j7 need for full charg

  11. Is pisen 20000 mah power bank is suitable for charging samsumg galaxy tab s2 9.7 lte.

    • Hi Ashim, Galaxy tab s2 9.7 features USB 2.0 and battery of 5870 mAh, technically the power bank should support charging the tab with a USB 2.0 to USB-A cable.

  12. Is pisen suitable for charging samsung galaxy tab s2 9.7 lte.

  13. Hii!! I have motog4 plus, motog 2nd gen and htc desire 628. What will be the best power bank for these phones ??? not necessary to charge all the 3 phones at the same time..

  14. I have an iPhone 5s and a iPad that I will be using in South America. I am traveling with carry on luggage therefore space is limited. Which power bank do you recommend for me to purchase?

  15. Hello I have infinix note 3 with 4500 mAh battery which power bank specs is suitable to use on it? Please very urgent.

  16. i have samsung galaxy note edge and its battery is 3000mah please suggest me a fast charging power bank .

  17. Which USB Port output(5V 1A or 5V 2.1A) from power bank, would you recommend charging moto e3 power that protects from decrements battery life.

    • Hello I read about the article mentioned above related to power banks … I just want to ask, Which USB Port output(5V 1A or 5V 2.1A) from power bank, would you recommend charging moto e3 power that protects from decrements battery life.

    • Hi Nara, I would recommend output of 5V 2.1A power bank, you see, your device will only draw the current it needs, no worries about it will damage your battery.

      • Thanks, Shirley, it’s helpful. I would also like to ask another thing which I observed in power bank (Intex IT-PB 20K Poly). As I already told you, it has two ports with above output. I connected the motoe3 phone to port (5V 2.1A) output, I felt really surprised as it takes more minutes to cross each and every charging percent than the output port from (5V 1A). Above observation, I felt only after I have charged power bank fully. but it’s not the case when I tested power bank connecting output port (5V 2.1A) to moto e3 power after unboxing it with output power that comes without charging power bank, I felt charging percentage(20%) crosses within 6 mints. Am not sure what has gone wrong. Your guessing/suggestions are much welcome.

        • Thanks, Shirley, it’s helpful. I would also like to ask another thing which I observed in power bank (Intex IT-PB 20K Poly). As I already told you, it has two ports with above output. I connected the motoe3 phone to port (5V 2.1A) output, I felt really surprised as it takes more minutes to cross each and every charging percent than the output port from (5V 1A). Above observation, I felt only after I have charged power bank fully. but it’s not the case when I tested power bank connecting output port (5V 2.1A) to moto e3 power after unboxing it with output power that comes without charging power bank, I felt charging percentage(20%) crosses within 6 mints. Am not sure what has gone wrong. Your guessing/suggestions are much welcome.

        • Hi Narayanan, in your case it’s quite interesting, theoretically the output of each port should be stable only if your phone doesn’t require the amount of power the port can supply, I mean if the port provides 2.1A but actually the phone only needs 1A, but it’s not the case either because you mentioned the charging with 1A port is faster. I’m wondering whether the output of 2.1A port is really 2.1A… if you want to figure the things out, I suggest you to use a USB meter to measure the power passing through, hope it will help you.

  18. Hello I read about the article mentioned above related to power banks …I just want to ask that I have a power bank with input power :DC 5V/1.2A and out put power :5V/2.1A
    So it is compatible to use it wd 4100 may battery !!?? Hope uh rply soon !! thankeww 🙂

    • Hello I read about the article mentioned above related to power banks …I just want to ask that I have a power bank with input power :DC 5V/1.2A and out put power :5V/2.1A
      So it is compatible to use it wd 4100 mah battery !!?? Hope uh rply soon !! thankeww 🙂

    • Hello Vibhuti, I’m afraid I need more info to answer your question, for instance, the capacity of your power bank and the input of your device.

      • Hiii . I have redme note 4..?? N I don’t know about d power bank it was gifted my someone…last year !!

      • Hiii . I have redme note 4..?? N I don’t know about d power bank it was gifted my someone…last year !!

        • Hello Vibhuti, the Redmi note 4 requires 5V / 2A input power, so it’s Okay to use your power bank to charge your phone, the only thing you may concern it’s the recharge cycle as the capacity of Redmi Note 4 battery is pretty high, if your power bank is not monster enough I’m not sure it can meet the need.

          • Hiii day s d only main concern actually it takes 2hrs maximum to charge from d charger I got WD d phone!! So I just want to ask dat I can use dat power bank in emergency ryt ??? It will not Damge my phone’s battery!!

          • Hello Vibhuti, you can use your power bank to charge your phone if your power bank is a qualified brand one. Never use the cheap unknown power banks to get away from explosion risks.

  19. For my OPPO R7 lite what powerbank do you suggest?

  20. I would buy sone power bank that have quick charge 3.0 it can be used in my Xperia Z5 Premium Dual that just support 2.0 quick charge? Thanks!

  21. my power bank is vevo 25000 mHg and my phone is 2000mHg but my phone will charge only upto 26% why?

    • If you can charge your phone with authentic charger regularly, then the problem goes to your power bank. There might be defect at the charging port or internal circuit.

  22. Can anyone plz recommend a good and high quality power bank for Lenovo vibe p1m (of 3900mAh battery ) plz

    • Refer to the around 4000mAh battery of your lenovo vibe p1m, I recommend a 10000mAh power bank for 2 charging cycles which can satisfy a full day use in most cases.

  23. Which power bank should I use for my Samsung J7 prime & Samsung tab A both

    • As Samsung J7 prime sports a 3300 mAh battery and tab A sports a 4200 mAh, and both of them supports USB 2.0 port, I recommend a 10000 mAh to 20000 mAh power bank for your proposal, if you are a heavy user, 20000 mAh power bank is able to reach 2 charging cycles of your devices for one-day-use.

  24. Hello. which powerbank will you most recommended for Oppo R7s?

  25. Hi, which power bank should i use for htc desire 816 , please help

  26. Hi would you recommend a power bank for Samsung s6 please.got a big capacity one but wife doesn’t like it.its too heavy..So was looking for a single ” charge port” one.thanks very much.

  27. Can you suggest a power bank to charge a Samsung Galaxy Tablet Tab 4 10.1 please

    • As the output rate of Tab 4 charger is 5V 2A and the battery capacity is 8220 mAh, I suggest a power bank which can at least charge more than 1 cycle. EasyAcc 20000 mAh Power Bank satisfies what you need. However, since samsung tablets use proprietary charging cables, you may need to get another charging cable for the power bank, hope my answer would help

  28. what happen when I use 10,000 mah solar powe bank in 3500mah mobile phone ?
    or any other low mah mobile phone

    • When the power bank is fully charged, it can charge the 3500mAh mobile 2+ times theoretically, if the mah capacity is lower then the charge cycles should be more

  29. How long does it take for them to recharge?

  30. If a power bank input is just 1Amp does it mean its not good?

    • The charging current massively depends on the charger you use, so if your power bank only inputs 1A most likely you used a 1A charger to charge it

  31. Thank you so much. Very informative article.

  32. Can I use a solar power bank to charge my phone?.

  33. Thanks a lot, seems to be helpful info!

  34. I notice that power banks with lower mAh in some cases are more expensive than those with higher mAh. Why is this so? Could it be that the cheaper ones with higher mAh have deficiencies in other areas?

    • Yes, the low cost power banks are made of cheap Li-ion or Li-Po batteries and unsafe protective circuits, even it claims to have high capacity, it’s more likely to be fake.

  35. Good one

  36. Good article.

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