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T21 Battery Storage Box 21*18650 with Flashlight Power Bank Case Battery Holder Box

33 reviews
100% of buyers enjoyed this product! 100 orders
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T21 Battery Storage Box 21*18650 with Flashlight Power Bank Case Battery Holder Box

18650 Battery Storage Boxes Features :

15W Wireless Charging
QC4.0 fast charge
PD3 .0 fast charge
Anti-reverse protection
Two LED Lights with 3 modes : Long Bright , Slow Flash and High Blinking
With 4 wires :for Input / micro / type-c
Hold 21pcs 18650 flat head batteries
Removeable, no need to welding ,detactable

T21 : Max Input / output 5V-2.1A

T21 QI : Max Input / output 5V-2.1A, Wireless Charging :5W

T21 PD : Max Input / output 5V-3A 9V-2A 12V-1.5A

T21 PD QI : Max Output: 5V-3A/ 9V-2A/ 12V-1.5A/ 4.5V-5A/ 5V-4.5A , Max Input: 5V-3A/ 9V-2A/ 12V-1.5A , Wireless Output: 15W

18650 Battery Storage Boxes Note :
Charging power depends on your device, for example: 9V-2A, it input/output 9V-2A only when the device supports 9V-2A
Please use NEW batteries and the voltage of batteries should more than 3.2V
Please first put all batteries in and then charging

Shipping

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.

RETURNS

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.

Refunds

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 Allavai (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://www.allavai.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.

Exchanges

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.

Real customer reviews

33 reviews
100% of buyers enjoyed this product!
5 stars
(27)
4 stars
(6)
3 stars
(0)
2 stars
(0)
1 star
(0)
Buyer
Review
M***n
verifed buyer
13 Apr 2026

Super fast shipping, quality is ??? Will gladly order again. Thank you!!!!!

Customer
verifed buyer
7 Apr 2026

Ok

Customer
verifed buyer
28 Mar 2026

Cool item, works great, I like it.

Customer
verifed buyer
25 Mar 2026

Good

A***v
verifed buyer
24 Mar 2026

Everything is TOP!!!!

Ю***о
verifed buyer
20 Mar 2026

okay

Customer
verifed buyer
11 Mar 2026

Normal quality for the money. Wireless charging worked immediately. Once all the batteries are inserted, you just need to plug it in to charge and everything works right away.

Customer
verifed buyer
1 Mar 2026

assembled from 18650 Samsung batteries. works well, fast charging works.

Customer
verifed buyer
21 Feb 2026

Received it, everything is great, works perfectly so far!

Customer
verifed buyer
19 Jan 2026

Great! It really does everything, including fast charging and wireless charging!

b***b
verifed buyer
11 Jan 2026

Very fast, i'm very satisfied

Customer
verifed buyer
28 Dec 2025

there is not enough of a normal flashlight.

f***r
verifed buyer
25 Dec 2025

Good quality, charging quite fast,

М***т
verifed buyer
16 Dec 2025

works well and wirelessly, packaging is good.

W***n
verifed buyer
14 Dec 2025

Everything is fine, thank you!

M***o
verifed buyer
12 Dec 2025

everything seems fine.

I***o
verifed buyer
6 Dec 2025

just about excellent

Y***a
verifed buyer
6 Dec 2025

A bit roughly assembled. some seams do not fully meet.

r***s
verifed buyer
5 Dec 2025

Very good delivery, very very quick. Good packaging. Item works not tested with full load of 18650. price good. Quality ok.

Customer
verifed buyer
29 Nov 2025

The order was well packed, the seller shipped quickly, the order arrived in Ukraine in 11 days (meest post). I recommend the seller.

Customer
verifed buyer
28 Nov 2025

Excellent

H***y
verifed buyer
26 Nov 2025

Overall, it's a normal box, working according to all stated parameters, just haven't tested 12v; charges quickly via type c, but very slowly via micro. charged 21 batteries of 3000mAH each, a 9v router with a load of 3 cable connections + 4 Wi-Fi connections, lasts a day with a discharge of up to 60% (-/+). Fast charging works, the downside is that the bottom part of the case isn't precisely molded; if placed on a flat surface with the output facing up, it wobbles slightly. It needs a little filing, but that's the only downside noticed.

Customer
verifed buyer
16 Nov 2025

everything is working. Thank you.

С***а
verifed buyer
15 Nov 2025

meest? I don't know who is responsible for this but I don't like it. Please provide a proper delivery service.

b***k
verifed buyer
30 Oct 2025

Very successful.. I recommend it.. Thank you..

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