Anker A7516 Ultra Slim Four-Port Data Hub review

A slim expander for an existing USB-A computer port

The Anker A7516 Ultra Slim hub adds four USB-A data sockets from a USB-A host connection. It is a useful distinction in a market full of USB-C products: this is an expander for a computer that already has the rectangular USB connection, not a USB-C dock with display and laptop-charging functions. Its advertised data rate is up to 5 Gbps.

The original guide illustrates the host plug and four downstream USB-A sockets. That layout suits a compatible computer with too few accessible ports for ordinary accessories. It does not give a USB-C-only laptop a direct connection, and it does not supply downstream USB-C sockets for a newer drive. Identify the computer-side plug before comparing the number of ports.

Four sockets share the computer's power budget

Anker's guide says the connected devices should not exceed a combined current of 900 mA for a stable connection. That is a total for the attached accessories, not an allowance for each of the four sockets. A collection of low-demand devices can be a very different load from several portable drives, even though both collections fit physically.

The guide's examples put a mouse at 100 mA, camera at 300 mA, keyboard at 500 mA and external hard drive at 900 mA. These are planning examples rather than ratings for every device in those categories. Check your actual accessories, particularly a keyboard with additional lighting or a drive drawing its operating power from USB.

The practical decision is whether your accessory combination fits the documented budget. A drive approaching 900 mA already uses the entire allowance described in the guide. If several demanding devices need to stay connected together, a hub with a separately documented power supply and combined output budget is the more relevant category to investigate.

This is data expansion, not a charging station

Anker explicitly states on its Ultra Slim family page that the hub is not designed to charge devices. Its purpose is connecting data peripherals to the computer. There is no USB-C Power Delivery input in the complete four-port layout, and no route to charge a laptop through it.

This matters even for someone who only wants to charge a phone while working. A socket having USB-A contacts does not establish a useful phone-charging capability, especially when the maker states the opposite intended use. Keep the phone's appropriate charging arrangement separate rather than counting this hub as four additional charger outputs.

Understand the 5 Gbps interface claim

The original specification gives a 5 Gbps data speed. It also explains that the computer, accessories, cables and software all need USB 3.0 support for the fastest supported behavior. A slower element in that path can limit the connection.

The figure is an advertised interface ceiling, not our measured copy speed and not four independently dedicated 5 Gbps paths into the computer. Input devices and occasional file transfers place different demands on that shared link. For an ordinary accessory setup, the useful questions are the connector types, power demands and number of devices you genuinely need connected together.

Choose the cable arrangement and computer scope carefully

Anker's current family page offers different cable-length choices, while the inherited A7516011 catalog entry identifies a particular part. Check the actual selected package rather than assuming every A7516 listing includes an extension lead. A7517 is a separate source model and should not be treated as the same purchase just because its slim body looks similar.

The original A7516 guide specifies a 107 × 30 × 10 mm body and 35 g weight. Its historical computer list includes Windows 8, 7, Vista and XP, with Mac OS X 10.2 and above; the later family page lists Windows 10 and a later Mac OS baseline as well as Linux. Those are actual documented references, not a compatibility test for every new operating system or Apple chip.

Anker also cautions that some 2.4 GHz wireless equipment can be affected by nearby USB 3.0 connections. If a wireless receiver is part of your intended setup, consider its position and the manufacturer's advice rather than assuming every accessory combination is interchangeable.

When A7516 makes sense

Consider this hub for a documented compatible USB-A computer and four low-demand data connections within the stated combined current limit. Its narrow job can be an advantage when you do not need another screen, Ethernet or card readers. Choose a different arrangement for a USB-C host, laptop charging or several power-hungry storage devices. The right answer depends on the complete accessory set, not the four-port headline alone.

Manufacturer references: A7516 Ultra Slim family specifications; original A7516 welcome guide.