Collection: Power Adapters & Chargers

Which power adapter or charger do you actually need?

Most PC builders treat a charger as an afterthought until a cheap one starts buzzing, running hot or throttling a laptop mid-render. The real split between tiers comes down to wattage, power-delivery protocol and the switching components inside. Entry chargers (roughly 20W to 45W) are typically silicon-based single-port bricks. They suit phones, tablets and ultraportables that sip power. They're bulkier for the watts, run warmer, and often only negotiate basic USB Power Delivery profiles.

The sweet spot sits around 65W to 100W with gallium nitride (GaN) switching. GaN transistors switch faster with lower resistive loss, so the transformer and heatsinking can shrink and the charger stays cooler under sustained load. At this tier you usually get PD 3.0 with PPS (Programmable Power Supply), which lets phones like Samsung's step voltage in small increments for cooler, faster charging. Two or three ports are common, and one 100W unit can run a laptop, phone and earbuds from a single wall socket.

Enthusiast chargers (140W to 240W) use USB PD 3.1 Extended Power Range, which adds 28V, 36V and 48V profiles. That's what high-end creator laptops and some USB-C Monitors need. Diminishing returns hit hard here. If your laptop ships with a 65W brick, a 240W charger won't make it faster. The device only draws what it asks for, so you're paying for headroom you'll never use.

Upgrading and technical nuances

The biggest trap is multi-port power splitting. A "100W" two-port charger usually means 100W on one port, but plug in a second device and it might drop to 65W plus 30W, or 45W plus 45W. Check the per-port breakdown on the spec sheet, not the headline number. Series like Anker Prime and Nano, UGREEN Nexode, Belkin BoostCharge Pro and Baseus GaN lines publish these splits, and that's what separates them from no-name bricks.

Cable ratings matter just as much as the charger. Anything above 60W needs a cable with an e-marker chip rated for 5A, and 240W needs a cable certified for PD 3.1 EPR. A cheap charging-only cable will quietly cap you at 60W or lower, and you'll blame the charger. Browse Cables & Connectors for properly rated USB-C leads rather than reusing whatever came with your headphones.

Proprietary barrel adapters are a different story. Dell's 4.5mm tip with its data pin, HP's blue-tip smart pin and Lenovo's slim-tip systems can all refuse to charge, or throttle the CPU, if the adapter doesn't identify itself correctly. For gaming laptops with a dedicated Graphics Card / GPU, the original 200W to 330W brick is often the only safe option, because transient GPU spikes can trip a marginal adapter's overcurrent protection and make the laptop stutter or shut down.

Don't confuse these with desktop Power Supplies or an ATX Power Supply. Those feed internal components via 24-pin, EPS and 12V-2x6 connectors. External adapters power mini PCs, laptops, routers, switches and peripherals. If you're building a compact Computer around an external brick, check its sustained wattage against your CPU and GPU load, not just idle draw.

Practical things to check before buying

Start with the output spec on your current adapter. Match the voltage exactly, make sure the polarity symbol (centre positive or negative) matches, and choose an amperage equal to or higher than the original. Lower amperage will overheat the adapter or cause brownouts under load. Higher is perfectly safe, because the device only pulls what it needs.

Physical size matters more than people expect. Folding-pin GaN chargers fit in a laptop sleeve, but wall-plug models can block adjacent sockets on a cheap powerboard. A desktop-style 140W+ charger with a cable can be bulky and heavy enough to pull out of a loose wall socket. If you're running a mini PC or NUC-style box mounted behind a monitor or inside a small Computer Case, leave airflow around the brick, because they throttle quietly when boxed in. Chargers are also heat sources, so keep them off carpets and out of tight cable-management pockets. A small fan or heatsink in a cramped enclosure can help, though a better-ventilated spot is the real fix.

For networking gear, keep the original adapter or buy a like-for-like replacement. Routers and switches from TP-Link and other Networking brands typically use 9V, 12V or 48V supplies, and a wrong voltage can fry the board. PoE injectors are another option for access points and cameras, but check whether you need 802.3af, at, or bt.

Lastly, look for the RCM mark. In Australia, mains-connected electrical goods must be compliant, and uncertified bargain chargers sold through grey-import listings are a genuine fire risk. If the price looks too good for a claimed 100W GaN unit, the internal components probably are too.

Brands and local warranty

For universal USB-C, the reliable names are Anker, UGREEN, Belkin, Baseus, Satechi and Cygnett, along with first-party Apple and Samsung chargers for their own devices. For laptops, Dell, HP, Lenovo, ASUS, Acer and MSI make the safest replacement bricks, because they're built to the exact power profile the machine expects. TP-Link and similar vendors cover networking supplies.

Local warranty matters here more than people think. A charger is a mains-connected device that runs hot every day, and failure is a question of when, not if, on cheap units. Buying from an Australian retailer means you're covered by Australian Consumer Law, which gives you a clear path for repairs, replacements or refunds if it fails or damages your device. Offshore marketplace sellers make that process painful and sometimes impossible. Keep your invoice, and register the product if the brand offers extended cover.

Frequently asked questions

Can I use a higher-wattage charger than the one that came with my laptop?

Yes, provided the voltage profile matches or is negotiated via USB PD. The laptop draws only what it needs, so a 100W charger on a 65W laptop is fine. The reverse is the problem: an underpowered charger may charge slowly, or not at all under load.

Is GaN actually better, or just marketing?

It's real engineering. GaN switches at higher frequencies with lower losses, so you get a smaller, cooler charger for the same output. Cheap silicon bricks of the same wattage are bigger and run hotter. That said, a well-built silicon charger from a reputable brand beats a poorly made GaN one.

Why is my laptop charging slowly with a USB-C charger?

Check three things: the charger's wattage on that specific port, whether the cable is rated for the power you need, and whether the laptop supports USB-C charging at that level. A 45W port feeding a laptop that wants 90W will charge slowly, and may drain under gaming load.

Can one charger run my laptop, phone and monitor?

Often yes, but only if the total output covers everything at once. Add up the realistic draw of each device and compare it with the charger's combined rating, not the single-port peak.

Are third-party replacement adapters safe for proprietary laptops?

Good ones from reputable brands are, as long as the voltage, amperage and connector match and they carry RCM compliance. Avoid unbranded units, since poor regulation can damage the battery and motherboard over time.