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header-product 4smarts UltiMag Portable Battery 20000 mAh

4smarts UltiMag Portable Battery 20000 mAh

Portable Battery 4smarts UltiMag 540244 Photo 1
Portable Battery 4smarts UltiMag 540244 Photo 2
Portable Battery 4smarts UltiMag 540244 Photo 1
Portable Battery 4smarts UltiMag 540244 Photo 2
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Short description

The 4smarts UltiMag Portable Battery features a powerful 20000 mAh Lithium Polymer (LiPo) capacity, ensuring your devices stay charged on the go. It supports Quick Charge 3.0 for fast charging, with 2 USB Type-A output ports and 1 USB Type-C port. Enjoy the convenience of wireless charging with a total output power of 20 W and an output current of 3 A. Available in sleek Black and Green colors, this battery is perfect for any tech enthusiast.
Warranty: 2 Years
SKU: 6927434
Manufacturer: 4smarts
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Product information

Description

The 4smarts UltiMag Portable Battery 20000 mAh is a high-capacity power bank designed to keep smartphones, tablets and other USB-powered devices charged during travel, work or daily use. With a 20000 mAh Lithium Polymer (LiPo) cell, multiple output ports and support for Quick Charge 3.0, it provides a combination of capacity and fast-charging capability in a compact, pocketable housing. The model also includes wireless charging functionality and a total output power rating that supports modern mobile devices.

Advantages

The portable battery offers a large 20000 mAh capacity that delivers multiple full charges for typical smartphones and extended runtime for tablets and accessories. Quick Charge 3.0 support accelerates charging of compatible devices through the USB Type-A ports, while the USB Type-C port provides flexible two-way connectivity for input and output. Wireless charging adds cable-free convenience for Qi-compatible phones. The unit is supplied in sleek color options and combines safety features typical for LiPo-based power banks with useful output current levels up to 3 A.

Suitable for

  • Charging smartphones and tablets while travelling
  • Powering headphones, smartwatches and other small USB accessories
  • Providing backup power during meetings or commuting
  • Use in workplaces, remote locations or on overnight trips

Key specifications

  • Battery type: Lithium Polymer (LiPo)
  • Capacity: 20000 mAh
  • Output ports: 2 × USB Type-A, 1 × USB Type-C
  • Fast charging: Quick Charge 3.0 support
  • Wireless charging: Qi-compatible pad with up to 20 W total output power
  • Maximum output current: up to 3 A
  • Available colors: Black, Green

How to use

Charge the power bank via the USB Type-C input using a compatible USB power adapter until the internal indicators show a full charge. To charge a device, connect it with a USB cable to one of the USB Type-A or USB Type-C outputs, observing the correct orientation for connectors. For wireless charging, place a Qi-compatible device centrally on the wireless pad. If the connected device supports Quick Charge 3.0, the power bank will negotiate higher charging voltage and current automatically when using the appropriate USB Type-A cable and compatible device.

Usage recommendations

Use a certified USB cable and a suitable wall adapter when recharging the power bank. Avoid exposing the battery to excessive heat or moisture and store it in a dry place when not in use. For optimal battery longevity, avoid keeping the power bank fully discharged for long periods and recharge it periodically if stored.

All features
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.54 kg
Battery technology: The type of battery in the device, e.g. nickel–cadmium (NiCd).
Lithium Polymer (LiPo)
Package weight: Weight of the packaged product.
710 g
Battery capacity: A measure of the charge stored by the battery. Determined by the mass of active material contained in the battery.
20000 mAh
Cable length: How long the cable is.
1 m
Input voltage: The voltage (V) which is required to power the product.
5, 9, 12
Output voltage:
5, 9, 12
LED indicators:
Charging, Battery level, Status
Product colour: The colour e.g. red, blue, green, black, white.
Black, Green
Cables included:
USB Type-A to USB Type-C
Input current:
3, 2, 1.5
Output current:
3 A
Package depth: The distance from the front to the back of the packaging.
208 mm
Package height: The distance from the top to the bottom of the packaging.
38 mm
Package width: The distance from one side of the packaging to the other.
106 mm
Manual:
Yes
Fast charging:
Yes
Housing material: What the casing of the product is made of.
ABS
Power protection features: Features that protect the device against power problems e.g. overload.
Overcharge, Short circuit
Charger compatibility: What devices can be used with charger.
Universal
Input interface: The ports (sockets) where the device connects with other devices.
Lightning + USB Type-C + Micro-USB
Shape: The external form, contours, or outline of the product.
Rectangle
Lightning connector: The product comes with a connector for the Apple Lightning system.
Yes
Wireless charging:
Yes
Charging source: How the battery is charged.
Solar
Quantity per pack:
1 pc(s)
Micro-USB connector: The device features a socket to connect a Micro-USB lead or device.
Yes
USB Type-A output ports:
2
Micro-USB connectors quantity:
1
USB Type-C connector:
Yes
Total output power:
20 W
USB Power Delivery (USB PD):
Yes
USB Type-A connector:
Yes
Fast charging technology:
Quick Charge 3.0
USB Type-C ports quantity:
1
Wireless charging power:
1.3 W
Lightning ports quantity:
1
Port 1 output power:
18 W
Port 2 output power:
18 W
Port 3 output power:
5 W
Port 4 output power:
20 W
Port 5 output power:
1.4 W
MagSafe compatible:
Yes

Description

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Customer reviews

Customer questions

FAQ

What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All 4smarts products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized 4smarts service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

Where can I download the instructions for Portable Battery 4smarts UltiMag 540244?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.