A laptop power adapter is most often called an AC adapter or power brick, while “charger” is a common catch-all name.
You’ll hear charger, adapter, brick, and power supply used like they’re the same thing. People aren’t wrong, they’re just pointing at different parts of the kit.
This post maps each name to the part it describes, then shows how to buy a replacement that fits, powers correctly, and won’t cook your port.
What Is A Laptop Charger Called? Common Names By Part
In many laptops, the battery-charging circuitry sits inside the laptop. The external piece mainly converts wall power into the DC power your laptop uses, so the “charger” label is often a shopping shortcut, not a technical label.
AC Adapter
This is the most common manual-and-spec-sheet name. It takes AC from the wall and outputs DC at a fixed voltage and current rating.
Power Adapter
Same device, friendlier wording. You’ll see it on packaging and retailer listings.
Power Brick
Casual slang for the rectangular block that does the conversion. When someone says “my brick got hot,” they mean the block, not the cable.
Laptop Charger
The broad shopper term. It can mean the brick alone, the cords, the tip, or a full kit. Listings don’t always match your assumption, so read what’s included.
Laptop Charger Names You’ll Hear In Stores And Manuals
Retail titles try to catch many search terms. That’s why one product can be labeled “AC adapter,” “charger,” and “power supply” in the same sentence.
Power Supply
In laptop context, “power supply” usually means the external adapter that supplies DC power. It does not mean the big internal PSU used in desktop towers.
Charger Cable Or Charging Cable
This label can mean either cable: the AC cord from wall to brick, or the DC cable from brick to laptop. Shops often ask which one you need because they’re frequently sold separately.
DC Plug, Barrel Plug, Or Tip
Many Windows laptops use a round barrel connector at the laptop end. Getting the right diameter matters. A near-match can feel like it fits, then drop power with a small bump.
USB-C Charger
If your laptop charges over USB-C, the brick is often sold as a USB-C charger, and the cable is sold as a USB-C charge cable. These can work across brands when the wattage and USB Power Delivery features line up.
Parts Of A Laptop Charger And What Each One Does
Break the kit into parts and you’ll know what to ask for when only one piece fails.
Wall Plug Or Mains Plug
This is the prong piece that goes into the outlet. Some adapters have prongs built in. Others use a detachable AC lead so you can swap the plug style by region.
AC Input Cord
The cable from the wall outlet to the brick. Higher-watt adapters often use a grounded, three-pin cord. Lower-watt adapters often use a two-pin cord.
Adapter Block
The block converts wall power to controlled DC output and includes safety circuits. If power drops when you move the cable, strain relief at the block or plug is a common failure spot.
DC Output Cable And Laptop-End Connector
This is the cable that runs to your laptop and the connector on the end. Common laptop-end connectors include:
- Barrel connector: a round plug, sometimes with a center pin or ID pin.
- USB-C: reversible, with charging based on USB Power Delivery negotiation.
- Magnetic connector: made to release if the cable is yanked.
How To Identify The Right Replacement Without Guesswork
Match the electrical output first, then match the connector, then check build quality. In that order.
Read The Output Label
Look for the “Output” line on the brick. You’ll see DC voltage (V) and current (A), and often wattage (W). Common laptop outputs include 19V, 20V, 15V, and 12V, with currents that land the charger at 45W, 65W, 90W, 100W, or higher.
Match voltage exactly. Match wattage at or above what your laptop expects, as long as voltage matches. Laptops draw what they need from a properly rated supply.
Confirm The Connector Fit
For barrel plugs, listings may show sizes like 5.5mm × 2.5mm or 4.5mm × 3.0mm. If you can’t find the size, search the old adapter’s model number, or measure the outer and inner diameter with a caliper.
For USB-C, the connector is simple but the power rules are not. Look for chargers that state USB Power Delivery (USB PD) compatibility and meet the wattage your laptop calls for.
Check For ID Pins And Polarity Symbols
Many barrel-plug adapters show a polarity symbol that indicates a positive center. Some models also carry identification data through a center pin. If the laptop expects that ID and doesn’t see it, charging can fail or performance can drop.
Spot Listing Red Flags
- Fixed barrel-plug adapters that claim a wide output voltage range.
- Blurry label photos or no label photos at all.
- No model number, no traceable brand, and no safety markings.
Common Names And Where You’ll See Them
This table translates between typical naming styles so you can search smarter and ask for the correct part.
| Label You’ll See | What It Usually Means | Where It Shows Up |
|---|---|---|
| AC adapter | External converter from wall AC to DC | Manuals, OEM parts pages |
| Power adapter | Same as AC adapter | Packaging, tech specs |
| Power brick | The block portion of the adapter kit | Casual speech |
| Power supply | The adapter that supplies DC at a set output | Retail titles, service docs |
| Charger | Catch-all term for adapter plus cables | Search queries, listings |
| DC plug / barrel plug | Round laptop-end connector | Connector charts, listings |
| USB-C charger | USB-C adapter that negotiates power | Modern laptop listings |
| Charge cable | Cable between adapter and device | Accessory pages |
| Mains lead | AC cord from wall to brick | Regional naming, travel lists |
USB-C Charging And USB Power Delivery Basics
USB-C made laptop charging less brand-locked, yet it also added a handshake. The charger and laptop agree on a power level before higher wattage flows.
USB-IF, the group behind the USB specs, notes that USB Power Delivery can scale up to 240W and adds fixed voltages like 28V, 36V, and 48V for higher-power devices. USB Charger (USB Power Delivery) is a solid reference when you want to sanity-check wattage claims and understand what “PD” is meant to cover.
Three Buying Checks For USB-C Laptops
- Per-port wattage: Multi-port chargers may split power. Check the port you’ll use, not just the total.
- Cable rating: Higher-watt charging can need a 5A-rated cable.
- Laptop limits: Some laptops charge over USB-C yet still need the OEM brick for full performance.
Situations That Change What You Should Buy
Use this table to match your situation to a safer purchase and the details to verify.
| Your Situation | What To Buy | What To Check |
|---|---|---|
| You lost the whole kit | OEM adapter or known-brand equivalent | Voltage match, wattage, connector fit |
| Brick works, wall cord is damaged | Replacement AC input cord | Connector shape, grounded vs ungrounded |
| USB-C laptop for travel | USB-C PD charger with enough wattage | PD label, per-port output, cable rating |
| Barrel-plug laptop at a desk | Exact-match adapter | Voltage, polarity symbol, barrel size |
| Dock on your desk | Dock with PD to host | Dock power limit, laptop watt need |
| High-power laptop throttles | Higher-watt OEM adapter | Required wattage, connector ID pin |
| Sharing one charger | Single USB-C PD charger, high watt | Highest laptop wattage, cable rating |
| Charging from a monitor | Monitor with PD output | Monitor PD wattage, cable quality |
Troubleshooting Clues Before You Buy Anything
It’s tempting to order a new charger the moment a laptop stops charging. A few quick checks can save you from replacing the wrong part.
Check The Easy Stuff First
- Try a different wall outlet. Loose outlets can mimic a bad adapter.
- Inspect both ends of the cable for bent pins, scorch marks, or a loose barrel fit.
- If the brick has an LED, note whether it stays on, flickers, or won’t light at all.
Signs The Adapter Or Cable Is Failing
- Charging starts and stops when you move the cable near the brick or near the laptop port.
- The brick makes a faint buzzing sound that changes with load.
- The connector feels hot at the laptop end.
- Battery percentage drops while plugged in during heavier tasks.
When The Laptop Port May Be The Issue
If the connector wobbles, the port may be worn or cracked. With USB-C, lint can stop the plug from seating fully. A careful clean with a wooden toothpick can help, as long as the laptop is powered off and unplugged.
Care Tips That Extend Charger Life
Most failures happen where cables bend and where plugs get yanked. A few habits cut down on replacements.
- Unplug by gripping the plug head, not the cable.
- Use a loose loop when storing the cable to avoid sharp bends.
- Keep the brick on a hard surface so heat can escape.
- Replace damaged cords early. Fraying can lead to shorts and arcing.
Replacement Checklist Before You Click Buy
- Match voltage: Use the exact DC voltage listed on the original adapter or laptop spec.
- Meet wattage: Pick equal or higher wattage, with matching voltage.
- Confirm connector: Barrel size or USB-C, plus any ID pin needs.
- Confirm what’s included: Brick, cable, or full kit.
- Pick traceable gear: Clear model number, clear label photo, and safety markings.
Clear Wrap-Up On Charger Names
When you want the technical name, say AC adapter or power adapter. When you want the common term, say laptop charger. When you want the slang term, say power brick. Pair the right name with the output specs and connector details, and you’ll get the correct replacement on the first try.
References & Sources
- USB Implementers Forum (USB-IF).“USB Charger (USB Power Delivery).”Lists USB Power Delivery features, power levels, and charging behavior tied to USB-C devices.