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

20000mAh power bank

How many times can a 20000mAh power bank fully charge your phone? Let’s take EasyAcc 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

Current Price: $34.99

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

2. OUTXE Savage 20000mAh Rugged Solar Charger 4A Dual Input (Type C and USB) $55.99


Outxe Savage 20000 mAh power bank is seriously built rugged against water, dust and tumbles, thoughtfully designed for outdoors, additionally the built-in high-effective 2W solar panel offers you a reliable alternative and renewable eco-friendly energy source. ultra-fast output power up to 18W, it takes only 1.7 hours to fully charge Samsung Galaxy S9. It has a 35 hours-lasting strong flashlight, 3 modes includes SOS , it works even underwater. It’s the best power bank for outdoors, solid, reliable and powerful.

You May Also Like:

How many times can a 10400mAh power bank fully charge your phone?

How many times can a 20000mAh power bank fully charge your phone?》有35个想法

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

  2. 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.

  3. 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 😀


  5. 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.

  6. 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

    1. 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.

  7. 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?

    1. 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.

  8. There is one caveat to these “rugged outdoors” Devices. They’re black. Let’s consider for a moment that black absorbs the most heat, and causes the battery cells inside to heat up unnecessarily. It would be great of they were white or a high-gloss silver. The device has to be in the sun for it to charge. It’s sort of a no-win situation currently with these black-bodied power banks. You need them in the sun to charge, but the sunlight warms the entire device. Heat is the enemy of charging…


Fill in your details below or click an icon to log in: 徽标

您正在使用您的 账号评论。 注销 /  更改 )

Twitter picture

您正在使用您的 Twitter 账号评论。 注销 /  更改 )

Facebook photo

您正在使用您的 Facebook 账号评论。 注销 /  更改 )

Connecting to %s

%d 博主赞过: