VIYISI G1212 10,000mAh 20W Power Bank with Built-In Cables

The VIYISI G1212 is a compact 10,000mAh power bank with built-in charging cables and a digital display. Its claimed 20W fast charging and cable-free convenience suit travel and everyday top-ups, though the listing gives conflicting details about its outputs and exact dimensions.

At a glance

Two built-in cables are claimed: Lightning for older iPhones and USB-C for newer iPhones and compatible Android devices.
A digital display and pass-through charging are listed features.
The listing describes the bank as slim and travel-friendly, with airline carry-on approval claimed.

Price

$22.98Save 23%

Reference price: ~~$29.99~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

Built-in Lightning and USB-C cables can reduce the need to carry separate phone-charging leads.
The 10,000mAh capacity and compact listed dimensions make it practical to carry for daily use or trips.
The digital display can show charging information at a glance.

Technical specifications

18 specifications

Identity
Brand	VIYISI
Model	G1212

Power and battery
Capacity	10000 milliamp_hours
Power configuration	Corded Electric
Battery cell type	Lithium Polymer
Voltage	5 volts
Amperage	3 A
Maximum output power	20 Wx 4
Battery charge time	3 hours
Battery	1 Nonstandard Battery batteries required. (included)

Charging and connectivity
Connector type	USB Type C
Number of ports	2
Rapid charging claim	50% in 30 mins

Dimensions and weight
Dimensions listed	4.96 x 2.93 x 0.6 inches
Weight listed	176 g
Battery weight	72 g

Other details
Color	Lavender Purple
Warranty description	2 year

What to know before buying

The listing claims 20W PD fast charging and 50% charge in 30 minutes, but does not specify the tested device or conditions. Charging speed varies by device and use.
The manufacturer says the bank can deliver 50%-70% of its capacity to devices after conversion losses. Actual top-ups depend on the receiving device and whether it is in use.

Listing details to confirm

The listing is contradictory about connectivity and output: one passage claims four devices can charge simultaneously through two built-in cables plus USB-C and USB-A ports, while the technical details list 2 ports and maximum output as "20 Wx 4". It also gives dimensions as 4.96"L x 2.93"W x 0.6"Th and elsewhere as 4.96"×2.93"×0.61", and describes the finish as lavender while one feature passage calls the bank black. Confirm the selected version's ports, total output, dimensions and color before buying.

Who is it for?

A good fit for

Travelers who want a pocketable backup battery with built-in Lightning and USB-C leads.
People charging compatible phones and small electronics who value an at-a-glance display and pass-through charging.

Less suited to

Buyers who need a clearly documented port layout or verified simultaneous charging for several devices.
Anyone seeking a confirmed charging-time guarantee across specific phones or charging conditions.

VIYISI G1212 10,000mAh 20W Power Bank with Built-In Cables · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 54 ratings

5 stars86%86%
4 stars9%9%
3 stars0%0%
2 stars5%5%
1 star0%0%

Customer feedback highlights perceived fast charging, compact size, portability, the built-in Lightning and USB-C cables, and the display. One customer reportedly said the bank fully charged in about half an hour, which should not be treated as a general device-charging time. These comments are relevant to its claimed 10,000mAh capacity and built-in cables, but the listing's unclear port and output details still matter for buyers planning to charge multiple devices. Ratings are mostly five-star, with some two-star ratings, and do not establish why customers rated it that way.

Positive themes

Customer feedback describes the bank as compact and convenient for travel.
Customers reportedly appreciate the built-in cables, digital display and charging speed.

Frequently asked questions

What cables are built into the VIYISI G1212?

The listing claims built-in Lightning and USB-C cables. It associates Lightning with iPhone 14 and earlier, and USB-C with newer iPhones and compatible Android devices.

Can it charge more than one device at once?

The feature text claims charging up to four devices simultaneously, but the technical details list 2 ports and do not clearly reconcile that claim with the cables and ports. Confirm the selected version's output configuration before relying on multi-device charging.

Does it support pass-through charging?

Yes. The listing says the power bank can recharge while connected to a device.

Can I take it on a plane?

The manufacturer claims the 10,000mAh power bank meets TSA carry-on requirements. Check current airline and security guidance for your trip.