3M Extension Lead Cube With USB – 4 AC Outlets, 3 USB Ports and 3m Extension Cable
Product description
What it is and what it solves
The 3M Extension Lead Cube is a compact power strip designed to consolidate multiple charging needs in one place. With 4 AC outlets and 3 USB ports, it aims to reduce the number of adaptors and tangled cables on desks, in lounges or hotel rooms. Its cube shape and a dedicated ON/OFF switch offer straightforward control of all outlets, which can help conserve energy and simplify set-ups in busy home offices or travel environments.
How it’s laid out and what’s included

At a glance, you get a compact cube that houses 4 traditional sockets and 3 USB ports (1 USB-C and 2 USB-A). The USB ports use smart IC charging to allocate current efficiently among connected devices. A 3-metre extension cord provides reach to distant outlets, useful when wall sockets aren’t close to the workspace. The unit is housed in fire-retardant material for everyday safety and includes an integral switch to power everything off at once when you’re done.
Strengths to note
On paper, the setup is sensible for a mixed device scenario: phones and tablets charging via USB in parallel to a laptop or a small adaptor plugged into one of the AC outlets. The three-metre cord adds flexibility for rooms where sockets sit away from the desk. The smart charging on the USB ports can help you avoid overcharging and optimise charging speeds for compatible devices.



Potential limitations and things to consider
The description indicates a multi- socket configuration that works for many standard devices, but it may not be ideal for high-wattage equipment that requires dedicated circuits. The USB-C and USB-A ports offer smart charging, yet real-world performance depends on the power available from the main socket and the device’s own power needs. If you rely heavily on high-power devices (e.g., power-hungry laptops) from a single source, you’ll want to check whether the 4 AC outlets plus USB loads fit within your outlet’s capacity.
Who it’s for

This lead cube is a practical fit for small home offices, travel setups, hotel rooms or living spaces where outlets are scattered and a tidy charging hub would help. It’s particularly convenient if you need a single, switchable power strip that can handle multiple devices without swapping adapters.
Who it isn’t ideal for
If your workflow depends on continuous high-wattage loads from several devices simultaneously, or if you require an i ndividual dedicated outlet for sensitive equipment, this unit may feel limited. It’s also not a guaranteed solution for units with very aggressive power demands that exceed what a standard multi-socket can safely manage.



When it makes sense to buy
Consider this extension lead cube when you need a compact, switchable hub that can service phones, tablets, small laptops, and other peripherals at a desk or on the go. The 3 m extension length helps reach distant wall sockets, which is handy in rooms with limited outlets.
What to check before buying

- Confirm that your devices’ total wattage won’t exceed what the outlets can safely handle.
- Consider the arrangement of your devices to avoid blocking adjacent outlets.
- If you’re sensitive to build quality or heat, note the fire-retardant housing as a basic safety feature, but ensure proper ventilation around the unit.
Practical usage example
Imagine you’re setting up a small home office in a compact space: a laptop, monitor, phone, and a couple of peripherals can all plug into the cube while you use the switch to power everything down at the end of the day. The USB ports offer convenient charging for a phone and a tablet while the laptop is plugged into one of the AC outlets.



The decision: Is it worth it?
Is it worth it? A solid pick if you want a compact, switchable hub for mixed devices in everyday use. It may not be the best option if you routinely push multiple high-wattage devices at once or require highly specialised outlets.
What’s included
In the box you’ll typically find the 3M cube power strip with its 3 m cord and the integrated switch. Check the packaging to confirm you have the right model for your region and that the USB ports align with your devices’ charging needs.
FAQ
- Can I plug a laptop into the AC outlets? Yes, as part of the four AC outlets, subject to total load.
- Does the USB-C port fast-charge? The USB ports use smart IC charging to optimise current, but the actual speed depends on the device and power source.
- Is the unit surge-protected? The description notes multiple safety protections, verify if short-circuit, over-voltage and over-current protection are explicitly listed for the exact model you’re buying.
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