How many times can a 20000mAh power bank fully charge your phone?

By February 3, 2016

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How many times can a 20000mAh power bank fully charge your phone? Let’s take EasyAcc Monster 20,000mAh power bank as a test example.

How Many Times Can a 20000mAh Power Bank Fully Charge Your Device

Actually, how many times can a 20000mAh power bank fully charge your device, smartphone, tablet, Gopro, even a macbook, is relevant to 3 primary factors.

#1 what device you wanna charge with a 20000mAh power bank?

The first factor is about how much capacity your device’s battery is.

Generally speaking, a good rule of thumb is to divide the mAh of 20000mAh power bank by the mAh of your device battery. 

So a 20000mAh power bank can “theoretically” charge an iPhone 6 plus from 1-100% 6.9 times (20000 / 2915 = 6.9). 

Keep in mind: this is never 100% accurate as there still some other factors involved which will influence the charging times, which is always higher than what a 20000mAh power bank can practically give. 

what device you are charging

 

#2 what is the device doing while it is being charged 

It’s not strange to see the device charged, for example, by a 20000mAh power bank, while you’re still using the device. So is there any difference between using the device while it’s plugged into and leaving the device alone or on airplan mode while it’s charged? The answer is undoutedly YES. 

If you are watching a movie on your device while the 20000mAh power bank is charging it, more power drained from the 20000mAh power bank and meantime it seems that your device is never charged. That is because you’re taking the power more quickly than the 20000mAh charges your device. And the number of times your power bank 20000mAh would reduce. 

If you leave your device alone or on airplan mode while charging, you will get more fully charges since the device is not taking much battery charge at all while the 20000mAh power bank is charging up the device.

what is the device doing while charged

 

#3 The charging cycles of the power bank 20000mAh 

More charging cycles the power bank has taken, its capacity will correspondingly reduce a little though you don’t need to care about that.

Theoretically, the capacity will reduce to 80% after 300 charging cycles. If so, a 20000mAh power bank may have a 16000mAh capacity. This is also relevant to the temperature when you’re using your power bank. And this point I believe you could find out on the manual when you brought the power bank. 

charging cycles

>>More About: EasyAcc Monster 20000mAh Power Bank

>>Buy at Amazon

Additionally, have your power bank 20000mAh happened to recharging problems? Check out the solutions:

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Comments (28)

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  1. Saare fudi de fuddu pan

  2. Lun fud lo mera

  3. my samsung power bank has 32000mah capacity.but it charges 2800mah battery smartphone only one time.what is the reasonfor this and what to do?

    • Hi Krithika, if the indicator shows the power bank is fully charged and it can only charge your 2800mAh phone one time, then it’s definitely broken, probably some Lithium batteries inside are defected, you’d better ask the after sale service for exchange or refund if it’s still under warranty.

  4. but how to charge the power bank ?

  5. How long does it take for a power bank with 20,000mAh to recharge its self? 16 to 20 hours, right? If it took less than 15 hours, does it mean there’s something wrong with the power bank? Im referring to Romoss Sense 6 LED

    • Generally speaking, the recharging speed massively depends on the charger you use, if the charger outputs only 1A current, apparently the charging time will be doubled as with 2A charger. Besides that, with respect to dual input power bank, the charging time will be halved accordingly, EasyAcc Monster 20000 mAh power bank is one of the best.

  6. It would be nice to in any of this

  7. This is a wonderful Power. You must have it, the price is well worth it.

  8. I believe about 14 times ..

  9. Looks like a very nice power source!

  10. Muy buena

  11. A must have with devices these days, save getting caught out when you really need to use 1 you haven’t counted on before leaving home.

  12. This would be really handy!

  13. because my battery does’t last long

  14. I really need this

  15. to keep my mobile and my wife’s phone full when we go out of town

  16. Awesome. Love 4 output ports option

  17. I need this because I want to be a autonomous of short battery life.

  18. I ALWAYS RUN OUT OF POWER SO A POWER BANK WOULD BE FANTASTIC SHARED ON FACEBOOK AND GOOGLE

  19. because I do not get the batteries smartphone, tablet, etc … thanks

  20. You’re right! I leave my phone when it’s charging! It’s also a good way to do something better than staying on the phone all day 😀

  21. My phone looses battery life at the most inopportune moments, so I end up turning it off so I can use it in case of an emergency. A 20000mah power bank could solve this constant reoccurring problem.

  22. I really need this! Can’t tell you how many times I’ve needed a charge. This is awesome!

  23. Power a phone on the run

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