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Product Details
Please NOTE :
Power bank has two regular standard of capacity , one is the battery capacity, one is the rated capacity. The 20,000mah power bank, being labeled 10000mah/3.7v core capacity be converted to rated capacity 12400mah/5v.
Why exist this difference?
The most important reason is the conversion rate. Because most of power bank's battery voltage is 3.7V, and power bank needs to increase the voltage to 5V when charging the mobile phone, which making the power bank's conversion efficiency only 3.75/5=74%, Also include generated heat when battery voltage boosting, and various of wire consumption, Electricity and self-consumption. these points add up to account for 30%-40% of the power of the mobile power source.So the 20,000mAh power bank can really be used by us is about 12400mAh.
Also, The conversion rate of the entire mobile power industry is basically in the range of 60%-70%. Please kindly noted.
Please search on Google if want to know the details
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Item Specifics
Brand Name:
Battery Type:
Li-polymer Battery
Charger & Battery in 1
Output Interface:
Double USB
Input Interface:
Micro Usb
Input Interface:
USB Type C
Shell Material:
Portable Power Bank
Support Quick Charge Technology:
Portable Phone Battery Charger
Feature 1:
Battery Power Bank
Feature 2:
Powerbank 20000mah
Feature 3:
Portable Charger for Phone
Feature 4:
External Battery Phone
Feature 5:
Portable External Battery
Feature 6:
Mobile Power Bank
Feature 7:
Battery Pack for Samsung Galaxy S10 S9 S8 Plus
Feature 8:
Power Bank for iPhone12 11 Xs Max X 8
Feature 9:
PowerBank for Xiaomi mi 9 8 se Redmi Note 7 5 pro
Shipping & Payment


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of My WordPress Website (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://sizstore.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Customer Reviews
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25 Mar 2021

работает хорошо.

25 Mar 2021

Хороший товар!

25 Mar 2021


24 Mar 2021

The parcel arrived in 25 days, the battery was packed in a branded box, complete with a cord for charging. While it seems normally charges, I will check further

24 Mar 2021

Fast delivery very good battery does its job well. I tested it with a tablet and a smartphone.

23 Mar 2021

a recommandé

23 Mar 2021

Very fast delivery. I received the delivery several days in advance. The delivery is very well packaged and the 2 pieces are not damaged. The batteries are well charged at least 80 or 90 percent. The delivery man is trusted you can go there with your eyes closed!

22 Mar 2021

All perfect, serious people, the item good, recommended stores because they care about the customer

22 Mar 2021

I did not go long, a couple of weeks. Acquisition is happy, boldly recommend to friends and friends

22 Mar 2021

Chic capacious paverbank! Enough really for a long time

21 Mar 2021

Excellent device in appearance and quality

21 Mar 2021

Looks great, I was walking for 2 months, for which the store made his apology.

19 Mar 2021

Шло 80 дней, беру не первый, качество отличное.

19 Mar 2021


19 Mar 2021

The parcel went long, the goods are excellent!

Super hot! Several others have checked this out in the last few hours

Power Bank 20000mAh Portable Charging Mobile Phone External Battery

15 Reviews
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